docker-ssh fails to connect

[iasonasxrist]

docker@minikube:~$ ssh docker@192.168.X.X

docker@192.168.X.X's password:

Permission denied, please try again.

docker@192.168.X.X's password:

Permission denied, please try again.

docker@192.168.X.X's password:

Connection closed by 192.168.X.X port 22

I typed the password "tcuser" but still denied!
Any ideas how to manage it ?