"Request" parameter not available in "Run Server Action" properties.


I'm new to Outsystems and currently working my way through the Guided Path 'Becoming a Traditional Web Developer. In the course 'Integrating Web Services' i need to fill in a 'Request Parameter', however, i can't get this option in my Service Studio (see attachment). I'm probably doing something wrong, but can't find it anywhere, even if i re-do the exercise from the start... 

Thanks in advance!


I figured it out when looking back a second time. In consuming the REST API i clicked 'NO' when i was asked if i wanted to use the response that i copied to the body, causing the 'Request Format' to be empty instead of JSON.

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