We run a self-hosted Invision community. This community is connected via an OAuth identity provider. Now we want to disable the default login method. 
Is there a way to turn it back on without accessing the AdminCP (e.g. in case the Identity Provider does not work anymore)?
Thank you!

If you have access to phpMyAdmin you should be able to reactivate it through the database.

To do this; login to phpMyAdmin -> (select DB) -> (in the Filters search type "login") -> Browse 'Core Login Methods'. Under "login_classnames" look for "IPS\Login\Handler\Standard" and click "Edit". Make sure "login_settings" says "{"auth_types":1}" and "login_enabled" show "1". Then "GO" to save.

Report back here if it worked for you. If not, we'll try to help another way.

Thank you! The way you describe works partially. The login method can be reactivated via the changed database entry, but the GUI customizations are not changed. The login mask for local users is not automatically shown again. This happens only after the method has been deactivated and reactivated via the GUI.

Do further changes have to be made in the database for this?

Edited February 17, 20214 yr by GOM IT

You probably need to also clear the datastore folder via FTP to clear caches.

Thanks both of you. It works!