If you are buying Madden 20 Overdrive coins in mmoan.com you should read this tutorial - How to disable two-factor authentication in Facebook in 3 steps:
Sign in your Facebook account to complete the setting. Click the "Settings". Choose the "Security and Login" to continue and complete.
Click Edit to modify the Use two-factor authentication as following image shows.
Turn off the Two-factor authentic if the two-factor authentic is on. The Two-factor authentic will be off as the image apply. And you have completed the settings.