diff --git a/mirrortea/repository/abstract_db_repository.py b/mirrortea/repository/abstract_db_repository.py
index 050c960..3ff80b2 100644
--- a/mirrortea/repository/abstract_db_repository.py
+++ b/mirrortea/repository/abstract_db_repository.py
@@ -14,15 +14,15 @@ class AbstractDatabaseRepository(ABC):
         """"""
 
     @abstractmethod
-    def get_user_by_id(self) -> User:
+    def get_user_by_id(self, user_id: str) -> User:
         """"""
 
     @abstractmethod
-    def update_user_by_id(self) -> User:
+    def update_user(self, user: User) -> User:
         """"""
 
     @abstractmethod
-    def delete_user(self) -> None:
+    def delete_user(self, user_id: str) -> None:
         """"""
 
     @abstractmethod
diff --git a/mirrortea/repository/sqlite_repository.py b/mirrortea/repository/sqlite_repository.py
index d8337b1..904561c 100644
--- a/mirrortea/repository/sqlite_repository.py
+++ b/mirrortea/repository/sqlite_repository.py
@@ -81,7 +81,7 @@ class SQLiteDatabaseRepository(AbstractDatabaseRepository):
                     user.username,
                     user.avatar_hash,
                 ),
-            ).fetchall()
+            )
 
         except sqlite3.IntegrityError:
             return UserAlreadyExistError("User already exist!")
@@ -90,6 +90,9 @@ class SQLiteDatabaseRepository(AbstractDatabaseRepository):
 
         return self.get_user_by_id(user_id=user.user_id)
 
+    def update_user(self) -> None:
+        """"""
+
     def delete_user(self) -> None:
         """"""
 
@@ -99,5 +102,8 @@ class SQLiteDatabaseRepository(AbstractDatabaseRepository):
     def get_matrix_room(self) -> MatrixRoom:
         """"""
 
+    def update_matrix_room(self) -> MatrixRoom:
+        """"""
+
     def delete_matrix_room(self) -> None:
         """"""