Hello Sai,
Welcome to Google Ads API Support team. Thank you for reaching out to us.
I can see that you have standard access for your developer account. However,
there is a eligibility requirement to use ReachPlanningService. Kindly validate
on your end if you have met each requirement below:
Hello Team,
We have standard access dev token and yet making calls
to ReachPlanningService gave this error "This request is not authorized to
call ReachPlanningService. Developer Token not enabled."
Below is the complete request and response. I am following this
snippet
https://github.com/goo