parameters: (self, user_name, serial_number)
return_statement: return self.get_response('DeactivateMFADevice', params)
docstring: Deactivates the specified MFA device and removes it from
          association with the user.
  
          :type user_name: string
          :param user_name: The username of the user
  
          :type serial_number: string
          :param serial_number: The serial number which uniquely identifies
              the MFA device.
docstring_summary: Deactivates the specified MFA device and removes it from
          association with the user.
docstring_tokens: Deactivates the specified MFA device and removes it from association with the user .
function: def deactivate_mfa_device(self, user_name, serial_number):
          """
          Deactivates the specified MFA device and removes it from
          association with the user.
  
          :type user_name: string
          :param user_name: The username of the user
  
          :type serial_number: string
          :param serial_number: The serial number which uniquely identifies
              the MFA device.
  
          """
          params = {'UserName': user_name,
                    'SerialNumber': serial_number}
          return self.get_response('DeactivateMFADevice', params)
function_tokens: def deactivate_mfa_device ( self , user_name , serial_number ) : params = { 'UserName' : user_name , 'SerialNumber' : serial_number } return self . get_response ( 'DeactivateMFADevice' , params )