Check for connectivity, not login status, on join from Matrix

Because connectivity is a cached & more specific than login status

matrix_appservice_kakaotalk/matrix.py

@@ -96,12 +96,12 @@ class MatrixHandler(BaseMatrixHandler):
             )
             return
         elif (
-            not await user.is_logged_in()
+            not user.is_connected
             and not portal.has_relay
             and not self.config["bridge.allow_invites"]
         ):
             await portal.main_intent.kick_user(
-                room_id, user.mxid, "You are not logged in to this KakaoTalk bridge."
+                room_id, user.mxid, "You are not connected to this KakaoTalk bridge."
             )
             return