I'm setting up a website for a fundraising event which participants can login to.
We recognise that making them setup yet another online account and having to remember yet another password is a hurdle to participation.
With this in mind we'd like people to be able to register and authenticate with their Facebook or Google accounts.
I remember seeing a SS2.4 module for this, but I can't find anything for SS3.1
Does such functionality already exist as a module? Or would I need to development it myself?