Get a paginated list of transactions for a customer by external ID (e.g. the customer ID in your system).
You can obtain this key from the Atlas dashboard. It must be of type secret
The external ID of the customer (e.g. the customer ID in your system)
1"external-customer-id-123"
The order of the results.
asc, desc "asc"
The page number of the results.
x >= 11
The number of results per page.
1 <= x <= 10010