Resolve type assertions

handlers/main.py

@@ -12,6 +12,9 @@ async def post_init(application: Application, bot_config: BotConfig) -> None:
     await application.bot.set_my_commands(bot_config.commands)
 
 async def start(update: Update, context: ContextTypes.DEFAULT_TYPE, users: Users):
+    assert update.effective_user is not None
+    assert update.message is not None
+
     user_id = str(update.effective_user.id)
     role = users.get_role(user_id)
     keyboard = []
@@ -39,6 +42,7 @@ async def start(update: Update, context: ContextTypes.DEFAULT_TYPE, users: Users
 
 async def handle_main_menu_callback(update: Update, context: ContextTypes.DEFAULT_TYPE, users: Users, gates: Gates):
     query = update.callback_query
+    assert query is not None
     data = query.data
     if data == "open_gate_menu":
         await open_gate_menu(update, context, gates=gates)