How to insert text in google docs through function execution script API

Question

I opened a google doc. In that document created a app script function (attached function code img) in this function i am trying to insert some text(document cursor location) in current active document. So calling this function through script run API(passing function name in API body in Executing Apps Script Functions API body). So i am not able to insert that text in document through the function execution API. If i using directly Debug and Run that function that time i am able to insert the text in document.