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I have an existing web application that authenticates users against a MySQL database. Users must either be created by a "super user" or have an invitation key.
I am looking for someone to use the HybridAuth library (or Janrain library) to enable users to use a "single sign-on" and create their accounts using their Facebook, Twitter or Google account, or to link their existing account on the application with one of those social accounts, and login that way from then on.
If this can be completed timely and at my budget, I have additional work on this application that I am willing to discuss with freelancer(s) for a higher budget.
Please provide examples of past works, preferably with social authentication.