Have to use keychain twice when logging in on iOS to get username and password

[OddHouseGames]

If you use keychain on iOS, it grabs only username, then you have to use keychain again a second time to get the password.

[brandoncote]

ya. it's really annoying, and to make it worse, the second time you use it it also fills your username into the optional phone number field!

[brandoncote]

note that this (screenshot) technically works to login, but annoyingly requires two uses of the autofill command--it should only require it once, as other apps do.

and although it works, it will likely confuse many users who think something wrong happened, or that they need to erase the phone number field.

[pixlwave]

Closed by #6469 and the new authentication flow.