When you log in using CentOS non-root user, I find it slow, and pop-up the following information:
/usr/bin/xauth: timeout in locking authority file /home/***/.Xauthority
Usually because when you create a user, the user's home directory does not belong to the group and owner, lead, so the easiest solution is to give the user's home directory permissions granted to all users will be able to solve. When logging in again, it will re-create such a file, the next time you log on quickly.