Redirect User to particular route if user is in blocked state after SSO Authorization

Here is the patch.

If you need to redirect the user to a specific URL, you should not hard-code that, but make it a config option.

In the mean time, a good first step is probably to simply check whether the user is blocked and *not* display the generic error if this is the case.

Drupal already shows "The username has not been activated" and the additional generic error message from openid_connect is confusing, as there was no error :-)

Patch looks good, no longer shows the generic login error when the user is created in a blocked state.