Handle serializer errors on connect

matrix_appservice_kakaotalk/kt/client/client.py

@@ -240,13 +240,17 @@ class Client:
         self.user.oauth_credential = oauth_info.credential
         await self.user.save()
 
-    async def connect(self) -> LoginResult:
+    async def connect(self) -> LoginResult | None:
         """
         Start a new talk session by providing a token obtained from a prior login.
         Receive a snapshot of account state in response.
         """
+        try:
             login_result = await self._api_user_request_result(LoginResult, "connect")
             assert self.user.ktid == login_result.userId, f"User ID mismatch: expected {self.user.ktid}, got {login_result.userId}"
+        except SerializerError:
+            self.log.exception("Unable to deserialize login result, but connecting anyways")
+            login_result = None
         # TODO Skip if handlers are already listening. But this is idempotent and thus probably safe
         self._start_listen()
         return login_result

matrix_appservice_kakaotalk/user.py

@@ -412,6 +412,7 @@ class User(DBUser, BaseUser):
         try:
             login_result = await self.client.connect()
             await self.on_connect()
+            if login_result:
                 await self._sync_channels(login_result, sync_count)
             return True
         except AuthenticationRequired as e: