How to see Login history?

/var/log/auth.log

That contains a lot more than just plain logins (sudo calls, etc) but logins are in there too. It's protected so you'll need to be root to read it:

sudo less /var/log/auth.log

As Suhail mentioned in a comment, the last command will show a listing of last logged in users.

To view the most recent login for all accounts on the system, try lastlog. There's a few useful options, such as viewing only a specific user.