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Custom Login UI with Duo MFA



I’m trying to login via MFA on the frontend of our application. A couple of questions:

  1. Am I able to do MFA login strictly on the frontend, given that we have a custom login UI (not using Auth0 lock)?
  2. When trying to login with MFA, I’m getting a 403 response that MFA is required (using the Auth0 v9 api). I understand that Duo is not supported with this type of login request, so is there another option for logging in that will properly handle Duo?
  3. Given that we don’t use the Auth0 Login UI to handle login, is there a way for me to validate Duo separately from Auth0 (if needed) and then have Auth0 verify that the user is logged in with MFA?