fix unique self ignore

api_client/models/User.js

@@ -15,7 +15,8 @@ const UserSchema = new Schema({
         validate: {
             validator: async function (username) {
                 const user = await User.findOne({username});
-                return !user || user._id !== this._id;
+
+                return !user || user._id.toString() === this._id.toString();
             },
             message: "This user is already exists"
         }
@@ -28,7 +29,7 @@ const UserSchema = new Schema({
                 if (!token) return true;
 
                 const user = await User.findOne({token});
-                return !user || user._id !== this._id;
+                return !user || user._id.toString() === this._id.toString();
             },
             message: "Token duplicated"
         }