I am trying to get a saved report but I have to change dates by going to Change Criteria/Columns and choosing the correct time period. Is it possible to set the time parameters during or before the request?
At this time, I do not know of a way to change the date period in the saved search api call. I would suggest using DataService.query if you want to change the criteria on-the-fly. With DataService.query, you may need additional calls to other tables, but will ultimately have more control over the search criteria. Here is the documentation for DataService.query.