Using the Rest API, how to get the testcases for a test cycle

I'm trying to integrate some homegrown automation tooling into zephyr. I'd like to be able to update all of the testcases of a test cycle. 

In this manner I could create an execution record for each test case in the test cycle. 

Is this the right way to do that?

API Docs that I am using:  https://support.smartbear.com/zephyr-scale-cloud/api-docs/#tag/Test-Executions

It seems that the API requires a testcase on the Create test execution API.  But I'd like to have the option for the caller to just indicate that the testCycle passed without having to have them iterate over each testcase. 

thanks,

jon