Once your App Store Analytics data is flowing, you can choose to downgrade your API key permissions from Admin to "Sales and Reports" and "App Manager".
Step-by-step process
1. Generate a new API key with the "Sales and Reports" and "App Manager" permissions
2. Open your App Store source and click on "edit credentials"
3. Replace the "Key ID" and "Auth Key" with the new ones you just generated. Do not change the "Vendor ID" or erase it as that's what we use to know which Developer Account is being used.
4. Click "Check Credentials"
5. You should see a green status for Trends and Reviews. Not for Analytics, but that's ok, we'll still be able to fetch data.
Consequences
By removing the Admin permission our system won't be able to request new reports to the App Store API. Meaning that if we decide to add a new table to our platform, we won't be able to pull its data without this permission.
In contrast, we will be able to continue pulling reports that were already requested on your behalf.
For more details on App Store Analytics API permissions. have a look at Apple's documentation.