SSO users can login without redirecting to IDP
When you set up the Single Sign-on with any IDP, the user is redirected to the IDP login page and after logging in to the IDP he will be redirected back to the WordPress and logs into the WordPress site. Here, you can see the Login button for SSO on your WordPress site.
If you don’t want to show the IDP login page to users and want them to log in from the login form on your WordPress page by entering their credentials stored in your identity provider, the login form add-on will help you to achieve this. Here, you can see the Login form for SSO instead of the Login Button on your WordPress site.
1. IDP supporting password grant
2. IDP does not support password grant
Follow the step by step guide for using the add-on