Letting users login with facebook to an existing account
Configuring OpenID for each services is so painful. I have also gone through the same process when I had to enable FB, Gmail &amp; Twitter login at my website, but anyhow it was giving me problem even if I configured with the supported modules oauth &amp; connector.

At last I found another module named HYBRIDAUTH &amp; it worked so fine. Configuration is easy &amp; there is no need of any other addon module with this. Best part is, it's free, otherwise most of the module of this kind are from some paid service provider..

Try this &amp; I hope you will find all the services which you require along with facebook.