Send a message to a user.
A single record of the following fields is returned.
Method  | 
string  | 
The operation that requested this response.  | 
TransactionID  | 
decimal  | 
The unique message ID for this message.  | 
ErrorMessage  | 
string  | 
If blank, no error was returned.  | 
ErrorLocation  | 
string  | 
If blank, no error was returned.  |