How to set username and password login so that no need re-login every testing

Hello,

How to set username and password login so that no need re-login every testing ? because when im testing web using katalon always from start and must login first? how to set username and password so that when testing a web no need to login (password and username already saved) ?
thank you

log in as a simple case and others case without login, then call the login case if needed. And use test suites to structure your flow.