If you created your account with an Apple ID, Google account or email address, you will still be able to link it to a Facebook profile. To do so, you will need to:
- Press the tool icon at the top right-hand corner of the home screen to access the Settings menu.
- Select the "Link to Facebook" option under your username.
If you have the Facebook application on your device, once you select this option, your account will be linked to whichever profile you have open at the moment.
In case you have associated a profile to your account and you want to unlink it, you will have to follow the same steps and select "Disconnect from Facebook".