Are you sure ?
There are two different versions of FX Blue Trade Copier.
This is the local trade copy version where you install several MT5 terminals on one single VPS and define 1 master and x number of slaves.
There is no variable with username/password.
In the Sender version you define the Channel Names (TC1, TC2, TC3).
In the Receiver(s) you only define the Channel Name you want to connect to.