Fix User.get_by_username()

mautrix_telegram/context.py

@@ -31,8 +31,8 @@ if TYPE_CHECKING:
 
 
 class Context:
-    def __init__(self, az: "AppService", db: "scoped_session", config: "Config",
-                 loop: "asyncio.AbstractEventLoop", session_container: "AlchemySessionContainer"
+    def __init__(self, az: 'AppService', db: 'scoped_session', config: 'Config',
+                 loop: 'asyncio.AbstractEventLoop', session_container: 'AlchemySessionContainer'
                  ) -> None:
         self.az = az  # type: AppService
         self.db = db  # type: scoped_session

mautrix_telegram/db/user.py

@@ -58,7 +58,7 @@ class User(Base):
 
     @classmethod
     def get_by_username(cls, username: str) -> Optional['User']:
-        return cls._select_one_or_none(cls.c.username == username)
+        return cls._select_one_or_none(cls.c.tg_username == username)
 
     @property
     def _edit_identity(self):