I'm building a website in Go(lang) using Google App Engine. I want users to be able to register for the site by providing an Email and Password. I don't want to use the users API, because I don't want my users to require a google account and I eventually plan on making this a pay site.
What is a good way to handle user registration/authentication on google app engine? Should I use the datastore for user accounts and credentials, or Cloud SQL? Any other good options? I don't know where to start.
IMHO it's easier to use an existing, reputable infrastructure/service. Google offers such services, see What is the difference between Google identity toolkit, Google OAauth and Google+ sign in.
I opted for the Google Identity Toolkit, which nicely supports simultaneously both private accounts and federated logins with several popular identity providers.
Update June 17, 2016: The banner on the GITkit doumentation authentication indicates GITkit may be on its way out, to be absorbed into the Firebase Authentication.
