Log in to your development Moodle as an administrator and, from the Site administration menu, slide down to Plugins, then Authentication, and then click on Manage authentication:
The Manage authentication page lists the available authentication plugins (together with general configuration settings further down the page):
Check out the Moodle docs for details of the authentication process at https://docs.moodle.org/dev/Authentication_plugins#Overview_of_Moodle_authentication_process. What is important to realize about the authentication ...
