DeleteUserGroups()
From Rackspace Email & Apps API
This function will remove one or more groups from a user's address book.
Input Parameters
Four strings, and array of groups, and a result integer
Administrative username, Administrative password, Domain name, User ID (the portion of the email address before the @ symbol), Group array (array[0]="mygroup1", array[1]="mygroup2"...),
Result integer
Return Values
If successful, the return value of the function will be 1.
Consult the Result Code Table for a list of result codes and their meaning.