If you indicated that you want to use an external authorization provider, such as Okta, the page prompts you for connection details for that server. (This information would need to be provided by the administrator of your external authorization provider.)
OAuth Issuer URL - Indicates the fully qualified URL to the external server.
Application ID - Specifies the ID of the application for this site.
Secret - Specifies the secret for this application.
Allow Credentials - Indicates of the Allow Credentials setting for CORS should be True or False.
Validate URL - Indicates if you want the wizard to test and verify the OAuth Issuer URL.