Call .sync_updates on .connect iff exported_auth is None
Call .sync_updates on .connect iff exported_auth is None

Calling this method on exported clients would trigger a
UserMigrateError because it was being used on a non-native
data center. For .connects like this, don't attempt syncing
updates.

expectocode/Telethon,andr-04/Telethon,LonamiWebs/Telethon,LonamiWebs/Telethon,LonamiWebs/Telethon,LonamiWebs/Telethon