PyTest to update test case results to TestRails by providing the RunID

[mravitej]

I have explored and tried all the possible ways to update the test case results using PyTest to TestRails by providing the RunID and giving the Case ID as below. But it's not working for me.
@testrail('5348')
@pytestrail.case('5348')

Earlier i used Test Rails API to update the Results to Test Rails using Python. But right now am trying to update the test case result to TestRails using PyTest with decorators as above which is not working for me. Is there any proper documentation for it?

Note: I don't want to create any TestRuns using the Pytest. Just want to update only test case results for already existing RunID