fix: Don't ask for a verification code if the account has no email #652

Fixes #60 (https://tangled.org/tranquil.farm/tranquil-pds/issues/60).

See #130 (https://tangled.org/tranquil.farm/tranquil-pds/pulls/130/round/0) for earlier discussion; I had to close and re-open the PR since the source repository was deleted.