I am writing automation tests using codeception framework. I have a test cases which are verifying some functionality after user is logged in. There are around 20 test cases with different functionality. All test cases need an user to be logged in to the system, so I have written a login functionality under _before callback. When I execute all the test cases, before every test cases login functionality is checked which takes a lot of time. Can we write login functionality as precondition and once user is logged in it should execute all test cases?