Currently, we are creating a live streaming service that allows multiple users to comment simultaneously at a certain time.

I was able to use selenium to automate the test where one user logs in and executes a comment, but I want to test that 100 users can log in at the same time by logging in multiple users. We are.

If this is the case, what tools would you use?
Also, if you have an article that will be helpful, I would appreciate it if you could teach me.