<xs:element name="TestCredentials" type="xs:anySimpleType" xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <xs:annotation>
    <xs:documentation>
      <p xmlns="http://Hps.Exchange.PosGateway">TestCredentials validates the credentials passed in the header, but does not perform an action.</p>
      <p xmlns="http://Hps.Exchange.PosGateway" />
      <p xmlns="http://Hps.Exchange.PosGateway">
        <strong>Note:</strong> TestCredentials should only be used at the beginning of the certification period to validate credentials and connectivity to the certification environment. This should not be used as a "heartbeat" check and is not required for processing with the gateway.
                          </p>
    </xs:documentation>
  </xs:annotation>
</xs:element>