util.go

type Request interface {
    toPkiString() string
}

func prepareResponse(request Request, methodType string, endpoint string, options Options) string {
  	pkiString := request.toPkiString()
    requestJson, _ := json.Marshal(request)
    requestJson = string(requestJson)
  
    response := connect(methodType, endpoint, options, requestJson, pkiString)
    return response
}

func (approval Disapproval) Create(request CreateDisapprovalRequest, options Options) string {
  response := prepareResponse(request, "POST", "/payment/iyzipos/item/disapprove", options)
	return response
}