How to make a test case as precondition outside testconf.py

[phatle1]

Hi sir,
Hope you are doing well, appreciate your help here

is it possible to make a test case as a precondition by using @pytest.fixture outside the conftest.py?
context: I want to login and logout before and after every single test case, I have a test_credentials.py which have test_login and test_logout, and I want to make these cases as pre and post condition.
Once again, thanks for your support