Support plugin specific configuration

I think the approach here will be to support client plugins that implement \Drupal\Core\Plugin\PluginFormInterface and conditionally include a plugin's form in \Drupal\oauth2_client\Form\Oauth2ClientForm. This would allow client plugins to define additional configuration.

Example:

• \Drupal\user\Plugin\Action\ChangeUserRoleBase::buildConfigurationForm
• \Drupal\action\Form\ActionFormBase line 81

I don't have space right now to add but I'm happy to review any code or work on it when I have time.

I also expect that in your case, you would want to store the email address in TempStore ( user specific ) rather than configuration which would be site wide.

The email address in question is the one used by the site for sending out password reset emails, etc. It's not user-specific.

Your response made me realize, however, that the address I'm looking for is the email address entered on the "Basic site settings" page, which is presumably the address used by PHPMailer to send mail (I need to confirm that). In any case, the address is already collected and stored either by Drupal or by PHPMailer, so there's no need to ask for it again. I just need to modify the code to retrieve the site email address, and make it clear in the README that the site address must match the address used to sign in to Google Workspace.

Thanks.

I've changed the code, and it works fine. As far as I'm concerned, this can be closed.

Thanks again.

Thanks for the update. I'll leave this postposponed, and updated to be more general as a feature idea.