Jmeter:- want to login one lack users

I have a project and need to test lacks of users in jmeter but the problem I am facing is How to login lacks of users, it will be tedious for me to enter their data manually and the token. Can we remove or bypass the session id/token? So I won't need to input it manually. Is there any simple way to login lacks of user so i can test the load and stress testing. Or is there any other open source tool in which i test this?

Please reply me ASAP.

Thank you in advance.