One of the things that annoyed me was having to enter my login and password at every boot. I use SLIM. Fortunately SLIM is very easy to setup to autologin a specific user.
Here’s how… :
To make SLiM automatically login as a specified user (without having to type a password) the following lines in /etc/slim.conf should be changed.
# default_user simone
Uncomment this line, and change “simone” to the user to be logged into automatically.
# auto_login no
Uncomment this line and change the ‘no’ to ‘yes’. This enables the auto login feature.
Source: Arch Wiki pages