This is sent by the server to reject a login request.

Offset Type     Name             Description
------ -------- ---------------- ------------------------------
 0000  BYTE     cmd
 0001  BYTE     reason

Possible reason for the failure can be:

• 0x00 - Incorrect name/password (unknown user)
• 0x01 - Someone is already using this account
• 0x02 - Your account has been blocked
• 0x03 - Your account credentials are invalid (bad password)
• 0x04 - Communication problem
• 0x05 - The IGR concurrency limit has been met
• 0x06 - The IGR time limit has been met
• 0x07 - General IGR authentication failure