[bug]: Login codes are sent on signup attempt when signup disabled

Is there an existing issue for this?

• I have searched the existing issues

Current behavior

When I disable signups via the admin UI, then people can enter their email and an login code will be sent to them. When trying to enter the code, then the error appears, that signups are disabled.
I would expect that the error is already shown, when entering the email and no emails are sent, because they can't use it anyway and it causes unneccesary email traffic.

Steps to reproduce

1. goto instance root url
2. click on 'Create an account'
3. enter email
4. wait for login code email and enter it
5. error is shown, that signup is disabled

Environment

Production

Browser

None

Variant

Self-hosted

Version

v0.25.2