Invoke SAP BAPI Smart Service

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{
  Customers: {
    {id: 1, name: "Alliance Marketing", industry: "Marketing"},
    {id: 2, name: "Global Firm", industry: "Insurance"
  }
}

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=a!localVariables(
  local!sapPostResult,
  a!formLayout(
    label: "Account Posting",
    instructions: "BAPI_ACC_GL_POSTING_POST is a standard SAP function module that performs Accounting: General G/L Account Posting functionality. This is available within standard R/3 SAP systems depending on version and release level.",
    contents: {
      a!textField(
        label: "Result",
        value: local!sapPostResult,
        readOnly: true()
      )
    },
    buttons: a!buttonLayout(
      primaryButtons: {
        a!buttonWidget(
          label: "Post",
          style: "PRIMARY",
          saveInto: a!sapInvokeWithCommit(
            scsExternalSystemKey: cons!SAP_SCS_KEY,
            usePerUserCredentials: false(),
            hostname: cons!SAP_HOSTNAME,
            clientNumber: cons!SAP_CLIENT_NUMBER,
            systemNumber: cons!SAP_SYSTEM_NUMBER,
            bapi: "BAPI_ACC_GL_POSTING_POST",
            importParameters:{
              DOCUMENTHEADER:{
                OBJ_TYPE:"BKPFF",
                OBJ_KEY:"1",
                OBJ_SYS:"T90CLNT090",
                USERNAME:"SAPUSER",
                HEADER_TXT:"BAPI TEST",
                COMP_CODE:"3000",
                DOC_DATE:date(2016, 11, 02),
                FIS_PERIOD:"11"
              }
            },
            tableParameters:{
              ACCOUNTGL:{
                {
                  ITEMNO_ACC:"0000000003",
                  GL_ACCOUNT:"474210",
                  COMP_CODE:"3000",
                  PSTNG_DATE:date(2016, 11, 02),
                  DOC_TYPE:"SA",
                  FISC_YEAR:"2016",
                  FIS_PERIOD:"11",
                },
                {
                  ITEMNO_ACC:"0000000002",
                  GL_ACCOUNT:"113100",
                  COMP_CODE:"3000",
                  PSTNG_DATE:date(2016, 11, 02),
                  DOC_TYPE:"SA",
                  FISC_YEAR:"2016",
                  FIS_PERIOD:"11"
                }
              },
              CURRENCYAMOUNT:{
                {
                  ITEMNO_ACC:"0000000003",
                  CURRENCY:"USD",
                  AMT_DOCCUR:"5000",
                  EXCH_RATE_V:"0"
                },
                {
                 ITEMNO_ACC:"0000000002",
                 CURRENCY:"USD",
                 AMT_DOCCUR:"-5000",
                 EXCH_RATE_V:"0"
                }
              }
            },
            commitTransaction: true(),
            onSuccess: {
              a!save(
                local!sapPostResult,
                fv!result
              )
            },
            onError: {
              a!save(
                local!sapPostResult,
                fv!errorTitle
              )
            }
          ),
          submit: true
        )
      }
    )
  )
)