Ce 1019 exacttarget update user part3

This method is mostly exactly the same as `getUserEmail` above. To reduce the repetition, I'd consider making a helper method for getting the data from ET that just takes the values that change as parameters (i.e. `$oRetrieveRequest->Properties[]`, `$oSimpleFilterPart->Value`, `$oSimpleFilterPart->Property`) and returns the request result, and just have these methods handle the result.