So, I'm maintaining a Drupal 7 site for which we recently switched the users over to SSO through a third-party OAuth provider. The implementation isn't fancy, but added a login link to what I assume is the standard login page with a tabs for "registration, login, and password reset."
What I would like to do is remove the menu options altogether for regular users, keeping just the OAuth login link and some additional text to inform users of new registration procedures. For admins, I would like to preserve the regular name and password based login options.
I am aware of the Tab Tamer module, but I'd like a little more granular control. I believe I need to approach this with hook targeting the login block, but I haven't found any examples on how to control what HTML in the block itself.
So, how to do modify the login block's HTML to remove the extra tabs for regular users, but preserve it for admin users?