Login with Google Friend Connect has been replaced with Google+Friday, March 2nd, 2012
Unfortunately, Google does not provide any way to migrate users who have signed-up a website through GFC to Google+. This means that you can not login into your existent MyCamgirl profile using your Google credentials. Even if you already have a Google+ profile, there is no way to verify that you are the same person who signed-up via GFC.
Google has also removed support to others options like OpenID, Yahoo, twitter… The only option they offer now is Google+. However, if you have created your MyCamgirl profile through GFC and provided your twitter credentials instead of your Google credentials, you can access your profile via twitter (the button is just before Google+ button on the login page).
If you are one of the members who can’t login with your Google credentials, you must create a new MyCamgirl profile. Be sure you active your Google+ profile first.
This issue does not affect members who have signed-up through twitter or have used their personal e-mails.