Connecting a Hello sign API to apps script project
问题 I want to Create a new API app usin Google Apps script and Hello sign API I have specified the redirect URL as https://script.google.com/macros/s/AKfycbyKw3oLmpqINGsDml281iUbxBboKn950dqVFXNibMfLurxYcRPf/exec and the screenshot is shown below Also, the code of the apps script file is function doPost(e) { return ContentService.createTextOutput("Hello API Event Received."); } The documentation says: https://app.hellosign.com/api/eventsAndCallbacksWalkthrough I get error message as shown like