You can download OAuth Client plugin zip file for Joomla from here.
Congratulations, you have successfully completed your Google App OAuth Server side configurations.
Select your OAuth Provider from the Select Application dropdown. In case your OAuth Provider is not listed in the drop down, please select Custom OAuth Provider to continue.
You would find appropriate URL in Instructions to configure in the bellow section of Attribute Mapping (After completing test configuration please choose URL and Add a button on your site login page).
Congratulations, you have successfully configured the miniOrange OAuth Client plugin with your desired OAuth Provider. In case you have any questions in mind, you can always mail us at firstname.lastname@example.org.