Request GET
http://wsdev.onegreatfamily.com/v11.02/User.svc/login?username=billsmith&password=billspass&sessionid=bqyfeoyt2mfcmqd2pplwmdm1
Success Response Payload
<string xmlns="http://schemas.microsoft.com/2003/10/Serialization/">bqyfeoyt2mfcmqd2pplwmdm1</string>
Fault Response Payload
<RestFault xmlns="http://schemas.datacontract.org/2004/07/OGF.WS.Data">
<ErrorCode>551</ErrorCode>
<FaultMessage>An unhandled exception has occurred</FaultMessage>
</RestFault>