[API/Website] OAuth

[zyunlam]

This contains incomplete code for authenticating if a member is part of the ISSUIUC organization.

Tasks:

• [ ] Add in a URL that redirects to Github to authenticate the user
• [ ] Check if the user is part of the ISSUIUC organization
• [ ] If the user is not part of the ISSUIUC organization redirect them to an error page
• [ ] Add an API endpoint to check if the user has been authenticated

Possible useful resources: https://docs.github.com/en/apps/oauth-apps/building-oauth-apps/authorizing-oauth-apps https://docs.github.com/en/rest/orgs/members?apiVersion=2022-11-28#check-organization-membership-for-a-user

[zyunlam]

You want to fix this function https://github.com/ISSUIUC/ISS_HILSIM/blob/main/Central-Server/API/internal/auth.py#L5-L8