:doc:`User <index>` / Sub-Resource / MfaDevice

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MfaDevice
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.. py:method:: IAM.User.MfaDevice(serial_number)

  Creates a MfaDevice resource.::

    mfa_device = user.MfaDevice('serial_number')

  :type serial_number: string
  :param serial_number: The MfaDevice's serial_number identifier. This **must** be set.
  
  :rtype: :py:class:`IAM.MfaDevice`
  :returns: A MfaDevice resource
  