To do login to your AdultFriendFinder account, use below mentioned Bypass steps. 

Firstly, make sure you are connected in Proxies/Socks or VPN.

STEP 1. 

Open AdultFriendFinder.com and enter login details, if asking 2FA “Validate the last 4-digits of the Credit Card from Your Last Order, Answer security questions, Receive an email verification code” do not try any option to confirm, only follow next step.

STEP 2. 
Open New Tab, go to this link https://adultfriendfinder.com/live-model-chat and enter login details as screenshot in above, then click on the LOGIN button .

STEP 3. 
Finally, you have Bypass 2FA and will successfully login on Account. Enjoy it.

P.S: Each time when you try to login and appears 2FA, you can use steps for bypass.