fix: Error exception occurs when user with pending activation tries magic-link login

[kenjis]

Fixes #465

[datamweb]

@kenjis, why do we send email to a user who is not active yet through magic link?
Wouldn't it be better to display the error on the Magic Link page before sending the email?
I always have a problem with sending unnecessary emails.

[kenjis]

The user has not activated their account, maybe because they have not received the email for activation.

[datamweb]

Well, this is not a reason for us to allow the magic link to be sent to it email.
If he did not receive the activation email(6 code), he should apply again from 'auth/a/show', not through the magic link.

[kenjis]

If the session is expired, no way to get auth/a/show when they forget the password.
If they know their password, they don't need to go magic link page.
They can go login page.