FB has it's own authenticator.
https://www.facebook.com/help/270942386330392
you'll need to ask them for help.
--please don't forget to Accept as answer if the reply is helpful--
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I have the Authenticator app on my cell phone and it's generating codes every 30 seconds but, Facebook is asking for a 3rd party code but not accepting the codes from Authenticator. I'm 63 years old and not very tech savvy, so please be patient. Thank You!
FB has it's own authenticator.
https://www.facebook.com/help/270942386330392
you'll need to ask them for help.
--please don't forget to Accept as answer if the reply is helpful--
I thought I was in the dedicated forum for Authenticator questions...Did I miss something?