How to disable Facebook login integration
1) Login to Facebook with the account you want to unlink.
2)Select "Settings" from the pull-down menu in the upper right corner of the Facebook screen, and then select "Apps and Websites" from the menu on the left.
3)Apps that are linked to your Facebook public information will be displayed. Click on "Magic Bounce" from the app list to open the "INFO YOU'RE SHARING WITH THIS APP" edit screen.
4)You can set the range of customer information we collect by editing the "INFO YOU'RE SHARING WITH THIS APP" screen, or you can click "Remove" to remove the Facebook login link.