diff --git a/.idea/.idea.Abyss/.idea/workspace.xml b/.idea/.idea.Abyss/.idea/workspace.xml
index 6c4fbb4..ff3edf4 100644
--- a/.idea/.idea.Abyss/.idea/workspace.xml
+++ b/.idea/.idea.Abyss/.idea/workspace.xml
@@ -11,7 +11,19 @@
   <component name="ChangeListManager">
     <list default="true" id="bf317275-3039-49bb-a475-725a800a0cce" name="Changes" comment="">
       <change beforePath="$PROJECT_DIR$/.idea/.idea.Abyss/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/.idea.Abyss/.idea/workspace.xml" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/README.md" beforeDir="false" afterPath="$PROJECT_DIR$/README.md" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/Abyss/Abyss.csproj" beforeDir="false" afterPath="$PROJECT_DIR$/Abyss/Abyss.csproj" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/Abyss/Components/Controllers/Media/LiveController.cs" beforeDir="false" afterPath="$PROJECT_DIR$/Abyss/Components/Controllers/Media/LiveController.cs" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/Abyss/Components/Controllers/Media/VideoController.cs" beforeDir="false" afterPath="$PROJECT_DIR$/Abyss/Components/Controllers/Media/VideoController.cs" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/Abyss/Components/Controllers/Security/UserController.cs" beforeDir="false" afterPath="$PROJECT_DIR$/Abyss/Components/Controllers/Security/UserController.cs" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/Abyss/Components/Services/ResourceService.cs" beforeDir="false" afterPath="$PROJECT_DIR$/Abyss/Components/Services/ResourceService.cs" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/Abyss/Components/Services/TaskService.cs" beforeDir="false" afterPath="$PROJECT_DIR$/Abyss/Components/Services/TaskService.cs" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/Abyss/Components/Services/UserService.cs" beforeDir="false" afterPath="$PROJECT_DIR$/Abyss/Components/Services/UserService.cs" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/Abyss/Components/Static/Helpers.cs" beforeDir="false" afterPath="$PROJECT_DIR$/Abyss/Components/Static/Helpers.cs" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/Abyss/Model/ResourceAttribute.cs" beforeDir="false" afterPath="$PROJECT_DIR$/Abyss/Model/ResourceAttribute.cs" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/Abyss/Model/Task.cs" beforeDir="false" afterPath="$PROJECT_DIR$/Abyss/Model/Task.cs" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/Abyss/Model/User.cs" beforeDir="false" afterPath="$PROJECT_DIR$/Abyss/Model/User.cs" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/Abyss/Model/UserCreating.cs" beforeDir="false" afterPath="$PROJECT_DIR$/Abyss/Model/UserCreating.cs" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/Abyss/Program.cs" beforeDir="false" afterPath="$PROJECT_DIR$/Abyss/Program.cs" afterDir="false" />
     </list>
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
@@ -210,6 +222,11 @@
       <workItem from="1757782027930" duration="308000" />
       <workItem from="1757830765557" duration="1218000" />
       <workItem from="1757862781213" duration="341000" />
+      <workItem from="1757918235256" duration="1000" />
+      <workItem from="1758040123892" duration="21000" />
+      <workItem from="1758040188148" duration="1000" />
+      <workItem from="1758049713959" duration="86000" />
+      <workItem from="1758084310862" duration="14054000" />
     </task>
     <servers />
   </component>
diff --git a/Abyss/Abyss.csproj b/Abyss/Abyss.csproj
index 62c35d5..ec64339 100644
--- a/Abyss/Abyss.csproj
+++ b/Abyss/Abyss.csproj
@@ -13,6 +13,10 @@
         <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
         <PackageReference Include="NSec.Cryptography" Version="25.4.0" />
         <PackageReference Include="sqlite-net-pcl" Version="1.9.172" />
+        <PackageReference Include="SQLitePCLRaw.bundle_green" Version="2.1.11" />
+        <PackageReference Include="SQLitePCLRaw.core" Version="3.0.2" />
+        <PackageReference Include="SQLitePCLRaw.lib.e_sqlite3" Version="2.1.11" />
+        <PackageReference Include="SQLitePCLRaw.provider.e_sqlite3" Version="3.0.2" />
         <PackageReference Include="Standart.Hash.xxHash" Version="4.0.5" />
         <PackageReference Include="System.IO.Hashing" Version="10.0.0-preview.7.25380.108" />
     </ItemGroup>
diff --git a/Abyss/Components/Controllers/Media/LiveController.cs b/Abyss/Components/Controllers/Media/LiveController.cs
index e8464bf..c29e525 100644
--- a/Abyss/Components/Controllers/Media/LiveController.cs
+++ b/Abyss/Components/Controllers/Media/LiveController.cs
@@ -11,7 +11,7 @@ public class LiveController(ILogger<LiveController> logger, ResourceService rs,
     public readonly string LiveFolder = Path.Combine(config.MediaRoot, "Live");
 
     [HttpPost("{id}")]
-    public async Task<IActionResult> AddLive(string id, string token, string owner)
+    public async Task<IActionResult> AddLive(string id, string token, int owner)
     {
         var d = Helpers.SafePathCombine(LiveFolder, [id]);
         if (d == null) return StatusCode(403, new { message = "403 Denied" });
diff --git a/Abyss/Components/Controllers/Media/VideoController.cs b/Abyss/Components/Controllers/Media/VideoController.cs
index f90018e..68c1f75 100644
--- a/Abyss/Components/Controllers/Media/VideoController.cs
+++ b/Abyss/Components/Controllers/Media/VideoController.cs
@@ -60,7 +60,7 @@ public class VideoController(ILogger<VideoController> logger, ResourceService rs
             .Select(x => JsonConvert.DeserializeObject<Video>(x)).ToArray();
 
         
-        return Ok(sv.Zip(r, (x, y) => (x, y)).NaturalSort(x => x.x.name).Select(x => x.y).ToArray());
+        return Ok(sv.Zip(r, (x, y) => (x, y)).NaturalSort(x => x.x!.name).Select(x => x.y).ToArray());
     }
     
     [HttpGet("{klass}/{id}")]
diff --git a/Abyss/Components/Controllers/Security/UserController.cs b/Abyss/Components/Controllers/Security/UserController.cs
index fe6a95a..adeae87 100644
--- a/Abyss/Components/Controllers/Security/UserController.cs
+++ b/Abyss/Components/Controllers/Security/UserController.cs
@@ -42,7 +42,7 @@ public class UserController(UserService user, ILogger<UserController> logger) :
     public IActionResult Validate(string token)
     {
         var u = _user.Validate(token, Ip);
-        if (u == null)
+        if (u == -1)
         {
             return StatusCode(401, new { message = "Invalid" });
         }
@@ -54,7 +54,7 @@ public class UserController(UserService user, ILogger<UserController> logger) :
     public IActionResult Destroy(string token)
     {
         var u = _user.Validate(token, Ip);
-        if (u == null)
+        if (u == -1)
         {
             return StatusCode(401, new { message = "Invalid" });
         }
@@ -81,14 +81,14 @@ public class UserController(UserService user, ILogger<UserController> logger) :
             return StatusCode(403, new { message = "Denied" });
         
         // Valid parent && Privilege
-        var ou = await _user.QueryUser(_user.Validate(r, Ip) ?? "");
-        if(creating.Parent != (_user.Validate(r, Ip) ?? "") || creating.Privilege > ou?.Privilege)
+        var ou = await _user.QueryUser(_user.Validate(r, Ip));
+        if(creating.Privilege > ou?.Privilege || ou == null)
             return StatusCode(403, new { message = "Denied" });
             
-        await _user.CreateUser(new User()
+        await _user.CreateUser(new User
         {
-            Name = creating.Name,
-            Parent = _user.Validate(r, Ip) ?? "",
+            Username = creating.Name,
+            ParentId = ou.Uuid,
             Privilege = creating.Privilege,
             PublicKey = creating.PublicKey,
         } );
@@ -101,7 +101,7 @@ public class UserController(UserService user, ILogger<UserController> logger) :
     public async Task<IActionResult> Open(string user, [FromQuery] string token, [FromQuery] string? bindIp = null)
     {
         var caller = _user.Validate(token, Ip);
-        if (caller == null || caller != "root")
+        if (caller != 1)
         {
             return StatusCode(403, new { message = "Access forbidden" });
         }
@@ -114,7 +114,7 @@ public class UserController(UserService user, ILogger<UserController> logger) :
 
         var ipToBind = string.IsNullOrWhiteSpace(bindIp) ? Ip : bindIp;
 
-        var t = _user.CreateToken(user, ipToBind, TimeSpan.FromHours(1));
+        var t = _user.CreateToken(target.Uuid, ipToBind, TimeSpan.FromHours(1));
 
         _logger.LogInformation("Root created 1h token for {User}, bound to {BindIp}, request from {ReqIp}", user, ipToBind, Ip);
         return Ok(new { token = t, user, boundIp = ipToBind });
diff --git a/Abyss/Components/Services/ResourceService.cs b/Abyss/Components/Services/ResourceService.cs
index 580c0e0..b8b7a99 100644
--- a/Abyss/Components/Services/ResourceService.cs
+++ b/Abyss/Components/Services/ResourceService.cs
@@ -4,7 +4,6 @@ using System.Text;
 using System.Text.RegularExpressions;
 using Abyss.Components.Static;
 using Abyss.Model;
-using Microsoft.Extensions.Caching.Memory;
 using SQLite;
 using System.IO.Hashing;
 
@@ -21,19 +20,15 @@ public class ResourceService
 {
     private readonly ILogger<ResourceService> _logger;
     private readonly ConfigureService _config;
-    private readonly IMemoryCache _cache;
     private readonly UserService _user;
     private readonly SQLiteAsyncConnection _database;
 
-    private static readonly Regex PermissionRegex =
-        new(@"^([r-][w-]),([r-][w-]),([r-][w-])$", RegexOptions.Compiled);
+    private static readonly Regex PermissionRegex = new("^([r-][w-]),([r-][w-]),([r-][w-])$", RegexOptions.Compiled);
 
-    public ResourceService(ILogger<ResourceService> logger, ConfigureService config, IMemoryCache cache,
-        UserService user)
+    public ResourceService(ILogger<ResourceService> logger, ConfigureService config, UserService user)
     {
         _logger = logger;
         _config = config;
-        _cache = cache;
         _user = user;
 
         _database = new SQLiteAsyncConnection(config.RaDatabase, SQLiteOpenFlags.ReadWrite | SQLiteOpenFlags.Create);
@@ -42,13 +37,13 @@ public class ResourceService
         var tasksPath = Helpers.SafePathCombine(_config.MediaRoot, "Tasks");
         if (tasksPath != null)
         {
-            InsertRaRow(tasksPath, "root", "rw,r-,r-", true).Wait();
+            InsertRaRow(tasksPath, 1, "rw,r-,r-", true).Wait();
         }
 
         var livePath = Helpers.SafePathCombine(_config.MediaRoot, "Live");
         if (livePath != null)
         {
-            InsertRaRow(livePath, "root", "rw,r-,r-", true).Wait();
+            InsertRaRow(livePath, 1, "rw,r-,r-", true).Wait();
         }
     }
 
@@ -57,12 +52,12 @@ public class ResourceService
     {
         var b = Encoding.UTF8.GetBytes(path);
         var r = XxHash128.Hash(b, 0x11451419);
-        return Convert.ToBase64String(r ?? []);
+        return Convert.ToBase64String(r);
     }
 
-    public async Task<bool> ValidAll(string[] paths, string token, OperationType type, string ip)
+    private async Task<bool> ValidAll(string[] paths, string token, OperationType type, string ip)
     {
-        if (paths == null || paths.Length == 0)
+        if (paths.Length == 0)
         {
             _logger.LogError("ValidAll called with empty path set");
             return false;
@@ -74,7 +69,7 @@ public class ResourceService
         var relPaths = new List<string>(paths.Length);
         foreach (var p in paths)
         {
-            if (p == null || !p.StartsWith(mediaRootFull, StringComparison.OrdinalIgnoreCase))
+            if (!p.StartsWith(mediaRootFull, StringComparison.OrdinalIgnoreCase))
             {
                 _logger.LogError($"Path outside media root or null: {p}");
                 return false;
@@ -84,22 +79,24 @@ public class ResourceService
         }
 
         // 2. validate token and user once
-        string? username = _user.Validate(token, ip);
-        if (username == null)
+        int uuid = _user.Validate(token, ip);
+        if (uuid == -1)
         {
             _logger.LogError($"Invalid token: {token}");
             return false;
         }
 
-        User? user = await _user.QueryUser(username);
-        if (user == null || user.Name != username)
+        User? user = await _user.QueryUser(uuid);
+        if (user == null || user.Uuid != uuid)
         {
             _logger.LogError($"Verification failed: {token}");
-            return false;
+            return false; 
         }
 
         // 3. build uid -> required ops map (avoid duplicate Uid calculations)
         var uidToOps = new Dictionary<string, HashSet<OperationType>>(StringComparer.OrdinalIgnoreCase);
+        var uidToExampleRelPath =
+            new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase); // for better logging
         foreach (var rel in relPaths)
         {
             var parts = rel
@@ -117,6 +114,7 @@ public class ResourceService
                 {
                     ops = new HashSet<OperationType>();
                     uidToOps[uidDir] = ops;
+                    uidToExampleRelPath[uidDir] = subPath;
                 }
 
                 ops.Add(OperationType.Read);
@@ -129,16 +127,40 @@ public class ResourceService
             {
                 resOps = new HashSet<OperationType>();
                 uidToOps[uidRes] = resOps;
+                uidToExampleRelPath[uidRes] = resourcePath;
             }
 
             resOps.Add(type);
         }
 
-        // 4. batch query DB for all UIDs
+        // 4. batch query DB for all UIDs using parameterized IN (...) and chunking to respect SQLite param limits
         var uidsNeeded = uidToOps.Keys.ToList();
-        var rasList = await _database.Table<ResourceAttribute>()
-            .Where(r => uidsNeeded.Contains(r.Uid))
-            .ToListAsync();
+        var rasList = new List<ResourceAttribute>();
+
+        const int sqliteMaxVariableNumber = 900; // keep below default 999 for safety
+        if (uidsNeeded.Count > 0)
+        {
+            if (uidsNeeded.Count <= sqliteMaxVariableNumber)
+            {
+                var placeholders = string.Join(",", uidsNeeded.Select(_ => "?"));
+                var queryArgs = uidsNeeded.Cast<object>().ToArray();
+                var sql = $"SELECT * FROM ResourceAttributes WHERE Uid IN ({placeholders})";
+                var chunkResult = await _database.QueryAsync<ResourceAttribute>(sql, queryArgs);
+                rasList.AddRange(chunkResult);
+            }
+            else
+            {
+                for (int i = 0; i < uidsNeeded.Count; i += sqliteMaxVariableNumber)
+                {
+                    var chunk = uidsNeeded.Skip(i).Take(sqliteMaxVariableNumber).ToList();
+                    var placeholders = string.Join(",", chunk.Select(_ => "?"));
+                    var queryArgs = chunk.Cast<object>().ToArray();
+                    var sql = $"SELECT * FROM ResourceAttributes WHERE Uid IN ({placeholders})";
+                    var chunkResult = await _database.QueryAsync<ResourceAttribute>(sql, queryArgs);
+                    rasList.AddRange(chunkResult);
+                }
+            }
+        }
 
         var raDict = rasList.ToDictionary(r => r.Uid, StringComparer.OrdinalIgnoreCase);
 
@@ -148,10 +170,11 @@ public class ResourceService
         foreach (var kv in uidToOps)
         {
             var uid = kv.Key;
-            if (!raDict.TryGetValue(uid, out var ra) || ra == null)
+            if (!raDict.TryGetValue(uid, out var ra))
             {
-                // find an example path string for logging would require reverse map; keep uid for clarity
-                _logger.LogError($"Permission check failed (missing resource attribute): User: {username}, Uid: {uid}");
+                var examplePath = uidToExampleRelPath.GetValueOrDefault(uid, uid);
+                _logger.LogError(
+                    $"Permission check failed (missing resource attribute): User: {uuid}, Resource: {examplePath}, Uid: {uid}");
                 return false;
             }
 
@@ -166,7 +189,9 @@ public class ResourceService
 
                 if (!ok)
                 {
-                    _logger.LogError($"Permission check failed: User: {username}, Uid: {uid}, Type: {op}");
+                    var examplePath = uidToExampleRelPath.TryGetValue(uid, out var p) ? p : uid;
+                    _logger.LogError(
+                        $"Permission check failed: User: {uuid}, Resource: {examplePath}, Uid: {uid}, Type: {op}");
                     return false;
                 }
             }
@@ -175,6 +200,7 @@ public class ResourceService
         return true;
     }
 
+
     public async Task<bool> Valid(string path, string token, OperationType type, string ip)
     {
         // Path is abs path here, due to Helpers.SafePathCombine
@@ -183,16 +209,16 @@ public class ResourceService
 
         path = Path.GetRelativePath(_config.MediaRoot, path);
 
-        string? username = _user.Validate(token, ip);
-        if (username == null)
+        int uuid = _user.Validate(token, ip);
+        if (uuid == -1)
         {
             // No permission granted for invalid tokens
             _logger.LogError($"Invalid token: {token}");
             return false;
         }
 
-        User? user = await _user.QueryUser(username);
-        if (user == null || user.Name != username)
+        User? user = await _user.QueryUser(uuid);
+        if (user == null || user.Uuid != uuid)
         {
             _logger.LogError($"Verification failed: {token}");
             return false; // Two-factor authentication
@@ -205,34 +231,38 @@ public class ResourceService
         {
             var subPath = Path.Combine(parts.Take(i + 1).ToArray());
             var uidDir = Uid(subPath);
-            var raDir = await _database.Table<ResourceAttribute>().Where(r => r.Uid == uidDir)
+            var raDir = await _database
+                .Table<ResourceAttribute>()
+                .Where(r => r.Uid == uidDir)
                 .FirstOrDefaultAsync();
             if (raDir == null)
             {
-                _logger.LogError($"Permission denied: {username} has no read access to parent directory {subPath}");
+                _logger.LogError($"Permission denied: {uuid} has no read access to parent directory {subPath}");
                 return false;
             }
 
             if (!await CheckPermission(user, raDir, OperationType.Read))
             {
-                _logger.LogError($"Permission denied: {username} has no read access to parent directory {subPath}");
+                _logger.LogError($"Permission denied: {uuid} has no read access to parent directory {subPath}");
                 return false;
             }
         }
 
         var uid = Uid(path);
-        ResourceAttribute? ra = await _database.Table<ResourceAttribute>().Where(r => r.Uid == uid)
+        ResourceAttribute? ra = await _database
+            .Table<ResourceAttribute>()
+            .Where(r => r.Uid == uid)
             .FirstOrDefaultAsync();
         if (ra == null)
         {
-            _logger.LogError($"Permission check failed: User: {username}, Resource: {path}, Type: {type.ToString()} ");
+            _logger.LogError($"Permission check failed: User: {uuid}, Resource: {path}, Type: {type.ToString()} ");
             return false;
         }
 
         var l = await CheckPermission(user, ra, type);
         if (!l)
         {
-            _logger.LogError($"Permission check failed: User: {username}, Resource: {path}, Type: {type.ToString()} ");
+            _logger.LogError($"Permission check failed: User: {uuid}, Resource: {path}, Type: {type.ToString()} ");
         }
 
         return l;
@@ -250,7 +280,7 @@ public class ResourceService
         var owner = await _user.QueryUser(ra.Owner);
         if (owner == null) return false;
 
-        bool isOwner = ra.Owner == user.Name;
+        bool isOwner = ra.Owner == user.Uuid;
         bool isPeer = !isOwner && user.Privilege == owner.Privilege;
         bool isOther = !isOwner && !isPeer;
 
@@ -267,7 +297,7 @@ public class ResourceService
             case OperationType.Write:
                 return currentPerm.Contains('w') || (user.Privilege > owner.Privilege);
             case OperationType.Security:
-                return (isOwner && currentPerm.Contains('w')) || user.Name == "root";
+                return (isOwner && currentPerm.Contains('w')) || user.Uuid == 1;
             default:
                 return false;
         }
@@ -300,17 +330,25 @@ public class ResourceService
         return await Valid(path, token, OperationType.Write, ip);
     }
 
-    public async Task<bool> Initialize(string path, string token, string username, string ip)
+    public async Task<bool> Initialize(string path, string token, string owner, string ip)
+    {
+        var u = await _user.QueryUser(owner);
+        if (u == null || u.Uuid == -1) return false;
+        
+        return await Initialize(path, token, u.Uuid, ip);
+    }
+
+    public async Task<bool> Initialize(string path, string token, int owner, string ip)
     {
         // TODO: Use a more elegant Debug mode
         if (_config.DebugMode == "Debug")
             goto debug;
         // 1. Authorization: Verify the operation is performed by 'root'
         var requester = _user.Validate(token, ip);
-        if (requester != "root")
+        if (requester != 1)
         {
             _logger.LogWarning(
-                $"Permission denied: Non-root user '{requester ?? "unknown"}' attempted to initialize resources.");
+                $"Permission denied: Non-root user '{requester}' attempted to initialize resources.");
             return false;
         }
 
@@ -322,10 +360,10 @@ public class ResourceService
             return false;
         }
 
-        var ownerUser = await _user.QueryUser(username);
+        var ownerUser = await _user.QueryUser(owner);
         if (ownerUser == null)
         {
-            _logger.LogError($"Initialization failed: Owner user '{username}' does not exist.");
+            _logger.LogError($"Initialization failed: Owner user '{owner}' does not exist.");
             return false;
         }
 
@@ -349,8 +387,7 @@ public class ResourceService
                     newResources.Add(new ResourceAttribute
                     {
                         Uid = uid,
-                        Name = currentPath,
-                        Owner = username,
+                        Owner = owner,
                         Permission = "rw,--,--"
                     });
                 }
@@ -361,7 +398,7 @@ public class ResourceService
             {
                 await _database.InsertAllAsync(newResources);
                 _logger.LogInformation(
-                    $"Successfully initialized {newResources.Count} new resources under '{path}' for user '{username}'.");
+                    $"Successfully initialized {newResources.Count} new resources under '{path}' for user '{owner}'.");
             }
             else
             {
@@ -391,10 +428,9 @@ public class ResourceService
     public async Task<bool> Exclude(string path, string token, string ip)
     {
         var requester = _user.Validate(token, ip);
-        if (requester != "root")
+        if (requester != 1)
         {
-            _logger.LogWarning(
-                $"Permission denied: Non-root user '{requester ?? "unknown"}' attempted to exclude resource '{path}'.");
+            _logger.LogWarning($"Permission denied: Non-root user '{requester}' attempted to exclude resource '{path}'.");
             return false;
         }
 
@@ -429,13 +465,13 @@ public class ResourceService
         }
     }
 
-    public async Task<bool> Include(string path, string token, string ip, string owner, string permission)
+    public async Task<bool> Include(string path, string token, string ip, int owner, string permission)
     {
         var requester = _user.Validate(token, ip);
-        if (requester != "root")
+        if (requester != 1)
         {
             _logger.LogWarning(
-                $"Permission denied: Non-root user '{requester ?? "unknown"}' attempted to include resource '{path}'.");
+                $"Permission denied: Non-root user '{requester}' attempted to include resource '{path}'.");
             return false;
         }
 
@@ -467,7 +503,6 @@ public class ResourceService
             var newResource = new ResourceAttribute
             {
                 Uid = uid,
-                Name = relPath,
                 Owner = owner,
                 Permission = permission
             };
@@ -553,9 +588,8 @@ public class ResourceService
             return false;
         }
     }
-
-
-    public async Task<bool> Chown(string path, string token, string owner, string ip)
+    
+    public async Task<bool> Chown(string path, string token, int owner, string ip)
     {
         if (!await Valid(path, token, OperationType.Security, ip))
             return false;
@@ -601,7 +635,7 @@ public class ResourceService
         }
     }
 
-    private async Task<bool> InsertRaRow(string fullPath, string owner, string permission, bool update = false)
+    private async Task<bool> InsertRaRow(string fullPath, int owner, string permission, bool update = false)
     {
         if (!PermissionRegex.IsMatch(permission))
         {
@@ -615,7 +649,6 @@ public class ResourceService
             return await _database.InsertOrReplaceAsync(new ResourceAttribute()
             {
                 Uid = Uid(path),
-                Name = path,
                 Owner = owner,
                 Permission = permission,
             }) == 1;
@@ -624,7 +657,6 @@ public class ResourceService
             return await _database.InsertAsync(new ResourceAttribute()
             {
                 Uid = Uid(path),
-                Name = path,
                 Owner = owner,
                 Permission = permission,
             }) == 1;
diff --git a/Abyss/Components/Services/TaskService.cs b/Abyss/Components/Services/TaskService.cs
index 3290064..20705b1 100644
--- a/Abyss/Components/Services/TaskService.cs
+++ b/Abyss/Components/Services/TaskService.cs
@@ -61,7 +61,7 @@ public class TaskService(ILogger<TaskService> logger, ConfigureService config, R
         if(!await rs.Valid(VideoFolder, token, OperationType.Write, ip))
             return null;
         var u = user.Validate(token, ip);
-        if(u == null)
+        if(u == -1)
             return null;
         
         var r = new TaskCreationResponse()
@@ -74,7 +74,7 @@ public class TaskService(ILogger<TaskService> logger, ConfigureService config, R
         Directory.CreateDirectory(Path.Combine(TaskFolder, r.Id.ToString(), "gallery")); 
         // It shouldn't be a problem to spell it directly like this, as all the parameters are generated by myself
 
-        Task v = new Task()
+        Task v = new Task
         {
             Name = creation.Name,
             Owner = u,
@@ -83,7 +83,7 @@ public class TaskService(ILogger<TaskService> logger, ConfigureService config, R
             Type = TaskType.Video
         };
         
-        await System.IO.File.WriteAllTextAsync(
+        await File.WriteAllTextAsync(
             Path.Combine(TaskFolder, r.Id.ToString(), "task.json"), 
             JsonConvert.SerializeObject(v, Formatting.Indented));
 
@@ -239,7 +239,7 @@ public class TaskService(ILogger<TaskService> logger, ConfigureService config, R
                 return -1;
             }
         }
-        catch (Exception ex)
+        catch (Exception)
         {
             return -1;
         }
diff --git a/Abyss/Components/Services/UserService.cs b/Abyss/Components/Services/UserService.cs
index 8050c32..b96ca4b 100644
--- a/Abyss/Components/Services/UserService.cs
+++ b/Abyss/Components/Services/UserService.cs
@@ -14,22 +14,20 @@ namespace Abyss.Components.Services;
 public class UserService
 {
     private readonly ILogger<UserService> _logger;
-    private readonly ConfigureService _config;
     private readonly IMemoryCache _cache;
     private readonly SQLiteAsyncConnection _database;
     
     public UserService(ILogger<UserService> logger, ConfigureService config, IMemoryCache cache)
     {
         _logger = logger;
-        _config = config;
         _cache = cache;
         
         _database = new SQLiteAsyncConnection(config.UserDatabase, SQLiteOpenFlags.ReadWrite | SQLiteOpenFlags.Create);
         _database.CreateTableAsync<User>().Wait();
-        var rootUser = _database.Table<User>().Where(x => x.Name == "root").FirstOrDefaultAsync().Result;
+        var rootUser = _database.Table<User>().Where(x => x.Uuid == 1).FirstOrDefaultAsync().Result;
         
-        if (_config.DebugMode == "Debug")
-            _cache.Set("root", $"root@127.0.0.1", DateTimeOffset.Now.AddHours(1));
+        if (config.DebugMode == "Debug")
+            _cache.Set("abyss", $"1@127.0.0.1", DateTimeOffset.Now.AddHours(1));
             // Test token, can only be used locally. Will be destroyed in one hour.
         
         if (rootUser == null)
@@ -50,8 +48,9 @@ public class UserService
             Console.WriteLine("key: '" + privateKeyBase64 + "'");
             _database.InsertAsync(new User()
             {
-                Name = "root",
-                Parent = "root",
+                Uuid = 1,
+                Username = "root",
+                ParentId = 1,
                 PublicKey = publicKeyBase64,
                 Privilege = 1145141919,
             }).Wait();
@@ -61,15 +60,16 @@ public class UserService
     }
     public async Task<string?> Challenge(string user)
     {
-        var u = await _database.Table<User>().Where(x => x.Name == user).FirstOrDefaultAsync();
+        var u = await _database.Table<User>().Where(x => x.Username == user).FirstOrDefaultAsync();
         
         if (u == null) // Error: User not exists
             return null;
-        if (_cache.TryGetValue(u.Name, out var challenge)) // The previous challenge has not yet expired
-            _cache.Remove(u.Name);
+        
+        if (_cache.TryGetValue(u.Uuid, out _)) // The previous challenge has not yet expired
+            _cache.Remove(u.Uuid);
 
         var c = Convert.ToBase64String(Encoding.UTF8.GetBytes(GenerateRandomAsciiString(32)));
-        _cache.Set(u.Name,c, DateTimeOffset.Now.AddMinutes(1));
+        _cache.Set(u.Uuid, c, DateTimeOffset.Now.AddMinutes(1));
         return c;
     }
 
@@ -77,12 +77,13 @@ public class UserService
     // but the source that obtains the token must be the same as the source that uses the token in the future
     public async Task<string?> Verify(string user, string response, string ip)
     {
-        var u = await _database.Table<User>().Where(x => x.Name == user).FirstOrDefaultAsync();
+        var u = await _database.Table<User>().Where(x => x.Username == user).FirstOrDefaultAsync();
         if (u == null) // Error: User not exists
         {
             return null;
         }
-        if (_cache.TryGetValue(u.Name, out string? challenge))
+        
+        if (_cache.TryGetValue(u.Uuid, out string? challenge))
         {
             bool isVerified = VerifySignature(
                 PublicKey.Import(
@@ -95,16 +96,16 @@ public class UserService
             if (!isVerified)
             {
                 // Verification failed, set the challenge string to random to prevent duplicate verification
-                _cache.Set(u.Name, $"failed : {GenerateRandomAsciiString(32)}", DateTimeOffset.Now.AddMinutes(1));
+                _cache.Set(u.Uuid, $"failed : {GenerateRandomAsciiString(32)}", DateTimeOffset.Now.AddMinutes(1));
                 return null;
             }
             else
             {
                 // Remove the challenge string and create a session
-                _cache.Remove(u.Name);
+                _cache.Remove(u.Uuid);
                 var s = GenerateRandomAsciiString(64);
-                _cache.Set(s, $"{u.Name}@{ip}", DateTimeOffset.Now.AddDays(1));
-                _logger.LogInformation($"Verified {u.Name}@{ip}");
+                _cache.Set(s, $"{u.Uuid}@{ip}", DateTimeOffset.Now.AddDays(1));
+                _logger.LogInformation($"Verified {u.Uuid}@{ip}, Name: {u.Username}");
                 return s;
             }
         }
@@ -112,7 +113,9 @@ public class UserService
         return null;
     }
 
-    public string? Validate(string token, string ip)
+    // Id >= 1 : Success, Uid
+    // Id == -1: Failed
+    public int Validate(string token, string ip)
     {
         if (_cache.TryGetValue(token, out string? userAndIp))
         {
@@ -120,13 +123,13 @@ public class UserService
             {
                 _logger.LogError($"Token used from another Host: {token}");
                 Destroy(token);
-                return null;
+                return -1;
             }
             // _logger.LogInformation($"Validated {userAndIp}");
-            return userAndIp?.Split('@')[0];
+            return Convert.ToInt32(userAndIp?.Split('@')[0]);
         }
         _logger.LogWarning($"Validation failed {token}");
-        return null;
+        return -1;
     }
     
     public void Destroy(string token)
@@ -134,16 +137,24 @@ public class UserService
         _cache.Remove(token);
     }
 
-    public async Task<User?> QueryUser(string user)
+    public async Task<User?> QueryUser(int uid)
     {
-        var u = await _database.Table<User>().Where(x => x.Name == user).FirstOrDefaultAsync();
+        if (uid == -1) 
+            return null;
+        var u = await _database.Table<User>().Where(x => x.Uuid == uid).FirstOrDefaultAsync();
+        return u;
+    }
+    
+    public async Task<User?> QueryUser(string username)
+    {
+        var u = await _database.Table<User>().Where(x => x.Username == username).FirstOrDefaultAsync();
         return u;
     }
 
     public async Task CreateUser(User user)
     {
         await _database.InsertAsync(user);
-        _logger.LogInformation($"Created user: {user.Name}, Parent: {user.Parent}, Privilege: {user.Privilege}");
+        _logger.LogInformation($"Created user: {user.Username}, Uid: {user.Uuid}, Parent: {user.ParentId}, Privilege: {user.Privilege}");
     }
     
     static Key GenerateKeyPair()
@@ -195,23 +206,23 @@ public class UserService
 
                 if (VerifySignature(pubKey, data, signature))
                 {
-                    _logger.LogInformation($"Signature verified using user {u.Name}");
+                    _logger.LogInformation($"Signature verified using user {u.Username}");
                     return true;
                 }
             }
             catch (Exception ex)
             {
-                _logger.LogWarning(ex, $"Failed to import public key for {u.Name}");
+                _logger.LogWarning(ex, $"Failed to import public key for {u.Username}");
             }
         }
         return false;
     }
     
-    public string CreateToken(string user, string ip, TimeSpan lifetime)
+    public string CreateToken(int uid, string ip, TimeSpan lifetime)
     {
         var token = GenerateRandomAsciiString(64);
-        _cache.Set(token, $"{user}@{ip}", DateTimeOffset.Now.Add(lifetime));
-        _logger.LogInformation($"Created token for {user}@{ip}, valid {lifetime.TotalMinutes} minutes");
+        _cache.Set(token, $"{uid}@{ip}", DateTimeOffset.Now.Add(lifetime));
+        _logger.LogInformation($"Created token for {uid}@{ip}, valid {lifetime.TotalMinutes} minutes");
         return token;
     }
 }
\ No newline at end of file
diff --git a/Abyss/Components/Static/Helpers.cs b/Abyss/Components/Static/Helpers.cs
index 659e06a..652af79 100644
--- a/Abyss/Components/Static/Helpers.cs
+++ b/Abyss/Components/Static/Helpers.cs
@@ -73,8 +73,6 @@ public static class Helpers
         {
             return PathType.AccessDenied;
         }
-        
-        return PathType.NotFound;
     }
 }
 
diff --git a/Abyss/Model/ResourceAttribute.cs b/Abyss/Model/ResourceAttribute.cs
index bf72bf9..65055f2 100644
--- a/Abyss/Model/ResourceAttribute.cs
+++ b/Abyss/Model/ResourceAttribute.cs
@@ -1,9 +1,17 @@
+using SQLite;
+
 namespace Abyss.Model;
 
+[Table("ResourceAttributes")]
 public class ResourceAttribute
 {
-    public string Uid { get; set; } = "@";
-    public string Name { get; set; } = "@";
-    public string Owner { get; set; } = "@";
+    [PrimaryKey, AutoIncrement]
+    public int Id { get; set; }
+    
+    [Unique, NotNull]
+    public string Uid { get; init; } = "@";
+    [NotNull]
+    public int Owner { get; set; }
+    [NotNull]
     public string Permission { get; set; } = "--,--,--";
 }
\ No newline at end of file
diff --git a/Abyss/Model/Task.cs b/Abyss/Model/Task.cs
index 6292db5..f9066cd 100644
--- a/Abyss/Model/Task.cs
+++ b/Abyss/Model/Task.cs
@@ -9,7 +9,7 @@ public enum TaskType
 public class Task
 {
     public uint Id;
-    public string Owner = "";
+    public int Owner;
     public string Class = "";
     public string Name = "";
     public TaskType Type;
diff --git a/Abyss/Model/User.cs b/Abyss/Model/User.cs
index 26cb393..48abce1 100644
--- a/Abyss/Model/User.cs
+++ b/Abyss/Model/User.cs
@@ -1,9 +1,18 @@
+using SQLite;
+
 namespace Abyss.Model;
 
+[Table("Users")]
 public class User
-{
-    public string Name { get; set; } = "";
-    public string Parent { get; set; } = "";
+{ 
+    [PrimaryKey, AutoIncrement]
+    public int Uuid { get; set; }
+    [Unique, NotNull]
+    public string Username { get; set; } = "";
+    [NotNull]
+    public int ParentId { get; set; }
+    [NotNull]
     public string PublicKey { get; set; } = "";
+    [NotNull]
     public int Privilege  { get; set; }
 }
\ No newline at end of file
diff --git a/Abyss/Model/UserCreating.cs b/Abyss/Model/UserCreating.cs
index 6ede628..7172572 100644
--- a/Abyss/Model/UserCreating.cs
+++ b/Abyss/Model/UserCreating.cs
@@ -4,7 +4,6 @@ public class UserCreating
 {
     public string Response { get; set; } = "";
     public string Name { get; set; } = "";
-    public string Parent { get; set; } = "";
     public string PublicKey { get; set; } = "";
     public int Privilege  { get; set; }
 }
\ No newline at end of file
diff --git a/Abyss/Program.cs b/Abyss/Program.cs
index ad36158..7b79509 100644
--- a/Abyss/Program.cs
+++ b/Abyss/Program.cs
@@ -38,8 +38,6 @@ public class Program
             };
         });
 
-        builder.Services.BuildServiceProvider().GetRequiredService<UserService>();
-
         var app = builder.Build();
 
         // app.UseHttpsRedirection();