Add searching users

backend/app/users/service.py

@@ -280,4 +280,13 @@ class UserService:
                 obj_in={"avatar_url": None}
             )
             log.info("Avatar successfully deleted", extra={"user_id": user.id})
-            await session.commit()
+            await session.commit()
+
+
+    @classmethod
+    async def search_users(cls, username: str, offset: int = 0, limit: int = 30):
+        async with async_session_maker() as session:
+
+            users = await UserDAO.find_all(session, offset, limit, UserModel.username.ilike(f"%{username}%"))
+            log.debug("Search users")
+            return users