curl --request GET \
  --url https://api.test.doola.com/v1/partner/customers \
  --header 'Authorization: <api-key>'

{
  "payload": {
    "content": [
      {
        "doolaCustomerId": "<string>",
        "email": "founder@example.com",
        "firstName": "Ada",
        "lastName": "Lovelace",
        "customerTenantId": "<string>"
      }
    ],
    "page": 123,
    "size": 123,
    "total": 123,
    "totalPages": 123
  },
  "error": {}
}