help on creating a valid COM_CHANGE_USER packet

[J S]

Hello,

I'm trying to create a valid COM_CHANGE_USER packet to send to the server but I have not been successful so far, I get the "unknow comand" message.

The format of the packet according to the documentation is:
1 byte for command itself in this case 0x11 in hex
n bytes for username
n bytes for password
n bytes for database
2 bytes fo charset

The username, password and database I can get them from the read_auth function with auth.username, auth.password and auth.default_db.
Now I need to put all this info together and create the packet.

Can anyone help?
Thanks

JS