Get organisation opening balances by tax year

curl --request GET \
  --url https://api.sandbox.flowpayroll.ai/v1/organisation/balances/opening/{taxYear} \
  --header 'X-Auth-Token: <api-key>'

{
  "message": {
    "text": "<string>",
    "token": "<string>",
    "tokenArguments": [
      {
        "name": "<string>",
        "value": "<string>"
      }
    ]
  },
  "content": {
    "data": {},
    "metadata": {
      "dateFormat": "yyyy-MM-dd",
      "dateTimeFormat": "yyyy-MM-ddTHH:mm:ss.fffZ",
      "paginationToken": "<string>"
    }
  },
  "validationIssues": [
    {
      "field": "<string>",
      "reason": "<string>",
      "reasonToken": "<string>",
      "reasonTokenArguments": [
        {
          "name": "<string>",
          "value": "<string>"
        }
      ]
    }
  ],
  "messageToken": "<string>",
  "data": {
    "baseValues": {
      "gross": 306,
      "grossTaxable": 306,
      "grossNi": 306,
      "grossForEmployerNi": 306,
      "grossForEmployerClass1ANi": 306,
      "grossPensionable": 306,
      "grossForCourtOrders": 306,
      "tax": 45.2,
      "ni": 25.3,
      "pension": 0,
      "employerNi": 35.4,
      "employerClass1ANi": 35.4,
      "employerPension": 0,
      "studentLoan": 0,
      "postgraduateLoan": 0,
      "net": 235.5,
      "netDeductions": 0,
      "totalPayable": 235.5,
      "totalEmployerCost": 306,
      "niBand": {},
      "statutory": {
        "SSP": 0,
        "SMP": 0
      },
      "pensionContributionsByType": {
        "NetPayArrangement": 0,
        "ReliefAtSource": 0,
        "SalarySacrifice": 0
      }
    },
    "organisationId": "org_123",
    "createdBy": "user_123",
    "updatedBy": "user_456",
    "createdDate": "2024-01-01T00:00:00Z",
    "updatedDate": "2024-01-02T00:00:00Z",
    "apprenticeshipLevyAllowanceYtd": {
      "amountLeft": 100,
      "amountUsed": 100
    },
    "apprenticeshipLevyYtd": 100,
    "employmentAllowanceYtd": {
      "amountLeft": 100,
      "amountUsed": 100
    },
    "cisDeductions": {
      "amountLeft": 100,
      "amountUsed": 100
    },
    "statutoryPaymentsReclaims": {}
  }
}