I’m creating a web application for my university gymnasium. It requires me to add the functionality to let the university members to register using their university google account and any external users to register using their email. They cannot use google login.

I can create the external user registration process, but I don’t know how to create the Registration with google account part.

I tried several times to do this watching youtube videos and several online articles but, I still don’t understand how to do this.

https://github.com/TKBK531/gym_application
This is my github repository for the project.

I’m still relatively new to this area and I would love some advice.
Thanks.