mutation UpdateHelpCenterCustomDomainName($input: UpdateHelpCenterCustomDomainNameInput!) {
  updateHelpCenterCustomDomainName(input: $input) {
    helpCenter {
      id
      type
      publicName
      internalName
      description
      domainSettings {
        domainName
        customDomainName
        customDomainNameVerificationTxtRecord {
          __typename
        }
        customDomainNameVerifiedAt {
          __typename
        }
      }
    }
    error {
      message
      type
      code
      fields {
        field
        message
        type
      }
    }
  }
}

{
  "input": {
    "helpCenterId": "id",
    "customDomainName": {}
  }
}

{
  "data": {
    "updateHelpCenterCustomDomainName": {
      "helpCenter": {
        "id": "id",
        "type": "PUBLIC",
        "publicName": "string",
        "internalName": "string",
        "description": "string",
        "domainSettings": {
          "domainName": "string",
          "customDomainName": "string",
          "customDomainNameVerificationTxtRecord": {
            "__typename": "HelpCenterDomainNameVerificationTxtRecord"
          },
          "customDomainNameVerifiedAt": {
            "__typename": "DateTime"
          }
        }
      },
      "error": {
        "message": "string",
        "type": "VALIDATION",
        "code": "string",
        "fields": [
          {
            "field": "string",
            "message": "string",
            "type": "VALIDATION"
          }
        ]
      }
    }
  }
}