Product prices now

What every actual tenant of the product would pay now, by the tier its usage fits (§2.7). `?format=csv` answers a CSV file with a TOTAL line; formula-looking cells are prefixed with an apostrophe. Writes nothing.

curl -X GET "https://example.com/api/v2/products/497f6eca-6276-4993-bfeb-53cbbbba6f08/prices"

{}

{  "message": {    "error": "Your request was made with invalid credentials."  }}

{  "message": {    "error": "You are not allowed to perform this action."  }}

{  "message": {    "error": "Page not found"  }}