Maybe this is complicated but it would be nice to be able to log into just one of Twitter + mastodon server and have it tell me what it thinks my handle on the other service is (IE log in with Twitter and it tells me my mastodon handle, or log in with mastodon and it tells me my Twitter handle)
Reasons this would be good:
If I forget if I've used the service before or not
If a user associates their twitter with a mastodon handle, but then changes their mastodon handle, and wants to [or wants to check if they need to] remove the old one from ur server
Maybe this is complicated but it would be nice to be able to log into just one of Twitter + mastodon server and have it tell me what it thinks my handle on the other service is (IE log in with Twitter and it tells me my mastodon handle, or log in with mastodon and it tells me my Twitter handle)
Reasons this would be good: