int aecFPL_updateUsrData(id, size, data);
id is the member ID.
size is the size of the user data to update in bytes.
data is the user data to add to the member.
type is either MEMuid, SLABuid, WALLuid, or ARCuid.
This function updates user data to a member. The size should be the size of the user data in bytes. This function is only successful if user data already exists on a member, and the size of the new data is less than or equal to the size of the existing data.
This function returns SUCCESS (0) if successful. Otherwise, it returns a non-zero error number.