REST request to Google drive with mendix application

Please tell me how to proceed, ideally, please describe how to create a microflow. I have a Google cloud api (service account key). I need to make a request to Google drive to get the URL of the photo to display in mendix (image). I created a json (uploaded when creating the key in the service account), imported the mapping. And I started creating microflow using the get(rest) method. I have inserted images from Google drive into the URL location, but I do not know what to insert into the HTTP headers. And I no longer know how to finish the microflow. you may have worked with google cloud api, I will be glad to see screenshots of microflow! Thanks
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