curl --request GET \
  --url https://base_url/api/v1/registrations \
  --header 'Authorization: Bearer <token>'

{
  "data": {
    "registrations": [
      {
        "registration_id": "ec6d3db8-fd31-4303-8687-3ff98fb10ebf",
        "corporation_id": "2535af08-a139-4d0c-9827-1651e46dfbcf",
        "country": "US",
        "country_specific_details": {
          "legal_name": "Example Inc.",
          "state": "CA",
          "state_specific_details": {
            "payment_interval": "<string>",
            "sales_tax_id": "<string>",
            "username": "<string>",
            "password": "<string>",
            "pin": "<string>",
            "web_file_number": "<string>",
            "tax_types": [
              "RSST"
            ]
          }
        },
        "registered_at": "2023-12-25",
        "validation_status": "PENDING",
        "filing_status": "FILING",
        "registration_status": "REGISTRATION_IN_PROGRESS",
        "business_activity_status": "VALID",
        "registration_type": "SALES_TAX_REGISTRATION",
        "jurisdiction": "CA"
      }
    ]
  },
  "message": "Successfully fetched registrations."
}