curl --request GET \
  --url https://api.prod.commenda.io/api/v1/partner/commenda-os/customers/{customerId}/business-entities/{businessEntityId}/government-identifiers/{governmentIdentifierId} \
  --header 'x-api-key: <api-key>'

{
  "governmentIdentifier": {
    "country": "US",
    "businessEntityId": 44,
    "corporationType": "LLC",
    "key": "US_EIN",
    "displayName": "Employer Identification Number",
    "shortName": "EIN",
    "description": "US federal tax identifier issued by the IRS.",
    "purposes": [
      "TAXATION"
    ],
    "supportingDocument": {
      "id": 900,
      "fileName": "ein-letter.pdf",
      "fileUrl": "https://bucket.s3.amazonaws.com/ein-letter.pdf",
      "type": "EINLetter",
      "category": "TAX_AND_COMPLIANCE_DOCUMENT",
      "fileTypeSpecifiers": [
        ".pdf"
      ]
    },
    "isFunctionCritical": true,
    "isCustom": false,
    "linkedRegistrations": [
      {
        "internalIdentifier": "US_EIN",
        "displayName": "Employer Identification Number",
        "purpose": "TAXATION"
      }
    ],
    "id": "gov_123",
    "jurisdiction": "DE",
    "value": "12-3456789",
    "createdAt": 1735689600000,
    "lastUpdatedAt": 1735776000000,
    "regexString": "<string>"
  }
}