Facebook marketing api: Is is possible to manage custom audience for a client?

_x000D_ _x000D_ I have to integrate facebook custom audience apis with my application which handles users fb marketing. After I log the user in to get the access token with all the relevant permissions like ads_read,ads_management and business_managment. I am getting an error while trying to fetch the custom audiences for the client type: OAuthException, code: 272, message: (#272) This Ads API call requires the user to be admin of the application. User is not admin or developer of this application., x-fb-trace-id: H6HzozvlbXp [HTTP 400] Am I missing something in this or does facebook not allow for such a scenario or is it because the app is in development mode. P.S I did try to add another admin https://www.facebook.com/ads/manager/ but no option for an app in the same.