marketdata DefaultClient authentication does not seem to work, I have this piece code:
`func printCurrentPrice(symbol string) {
lastQuote, err := marketdata.GetLatestQuote(symbol, marketdata.GetLatestQuoteRequest{
Feed: marketdata.SIP,
Currency: "USD",
})
if err != nil {
fmt.Printf("Failed to get last quote for %s: %s\n", symbol, err)
return
}

fmt.Printf("The last quoted price for %s is $%.2f\n", symbol, lastQuote.AskPrice)
}`

This will simple return:
`$ go run main.go
Failed to get last quote for AAPL:
403 Forbidden

403 Forbidden

(HTTP 403)
`