Delete test execution in Zephyr Scale using API

Hello everyone, I m quite new to Zephyr Scale and I would like to know if I can delete test execution in Zephyr using backend API. 

I tried to look for the documentation https://support.smartbear.com/zephyr-scale-cloud/api-docs/#tag/Test-Executions however it does not have any existing function to do so 

I inspect the network tab when I delete the test execution, I notice it will hit this URL https://app.tm4j.smartbear.com/backend/rest/tests/2.0/testresult/bulk/delete

However i can't find any documentation for this URL 

Just wonder if anyone have clues on how can I do it

Any help is appreciated 👏