I use devstack single machine.

I log into machine with keys (machine.pem). But I created a new user and insert that user in /etc/sudoers file. When I make logout and I try log again with new user CentOS 7 show me:

Permission denied (publickey,gssapi-keyex,gssapi-with-mic).

The mistake appears with or wihout use the keys.

I did disabled selinux.