def mfa(access_token, mfa_type, responses)
      post_with_auth 'item/mfa',
                     ItemResponse,
                     access_token: access_token,
                     mfa_type: mfa_type,
                     responses: responses
    end
def mfa(access_token, mfa_type, responses)
      post_with_auth 'item/mfa',
                     ItemResponse,
                     access_token: access_token,
                     mfa_type: mfa_type,
                     responses: responses
    end
Public: Submit an MFA step.

 Does a POST /item/mfa call which gives you the ability to respond to an
 MFA.

 access_token - To submit MFA step for.
 mfa_type     - The MFA type indicated in the MFA response.
 responses    - List of answers/responses to MFA.

 Returns an ItemResponse instance.