code: func NewInvoice(chatID int64, title, description, payload, providerToken, startParameter, currency string, prices *[]LabeledPrice) InvoiceConfig {
  	return InvoiceConfig{
  		BaseChat:       BaseChat{ChatID: chatID},
  		Title:          title,
  		Description:    description,
  		Payload:        payload,
  		ProviderToken:  providerToken,
  		StartParameter: startParameter,
  		Currency:       currency,
  		Prices:         prices}
  }
docs: // NewInvoice creates a new Invoice request to the user.