PayPal Transaction Search API: PERMISSION_DENIED, No Permission for the requested operation

I'm writing a service (in .NET Core 3.1 and Refit if it matters) that pulls transaction activities from my PayPal business account for a given date range to use on an admin dashboard. Currently I'm following the tutorial here:

https://developer.paypal.com/docs/api/get-an-access-token-postman/

and here:

https://developer.paypal.com/docs/api/transaction-search/v1/

The first part, I can get an authorization key just fine (using curl or postman, curl below

curl --location --request POST 'https://api.paypal.com/v1/oauth2/token' \--header 'Content-Type: application/x-www-form-urlencoded' \--header 'Authorization: Basic <my client id>:<my secret>' \--header 'Content-Type: application/x-www-form-urlencoded' \// not sure what this is, postman specific maybe? --header 'Cookie: tsrce=devdiscoverynodeweb; ts=vr%3D0cee9361171ac120001362adffec14c3%26vreXpYrS%3D1679730671%26vteXpYrS%3D1585061694%26vt%3D0cee9390171ac120001362adffec14c2' \--data-urlencode 'grant_type=client_credentials'

This gives me an auth token both in postman and my custom service just fine. Next, when I try to pull the transactions (both in Postman and in code), I get an error

cUrl:

curl --location --request GET 'https://api.paypal.com/v1/reporting/transactions?start_date=2020-03-01T00:00:00Z&end_date=2020-03-31T23:59:59Z' \--header 'Authorization: Bearer <my token>' \// Postman???--header 'Cookie: tsrce=devdiscoverynodeweb; ts=vr%3D0cee9361171ac120001362adffec14c3%26vreXpYrS%3D1679730671%26vteXpYrS%3D1585061694%26vt%3D0cee9390171ac120001362adffec14c2'

Error:

{"localizedMessage": "No permission for the requested operation. ","suppressed": [],"name": "PERMISSION_DENIED","message": "No permission for the requested operation. ","details": [        {"field": null,"value": null,"location": null,"issue": "No permission for the requested operation. "        }    ],"information_link": "https://developer.paypal.com/docs/classic/products/permissions/","debug_id": "7e315038e8073"}

The info link in the error starts talking about 3rd party permissions, which I'm not sure is applicable because it is my Business account. Anyone have any ideas? I checked transaction history on my app in PayPal, so I'm at a lost.

Thanks in advance