I've several stocks in my portfolio and I'd like to access them using go,

right now I've the current code
account,err := ib.NewPrimaryAccountManager(engine)
if err != nil {
fmt.Println("error getting account ",err)
}
portfolio := account.Portfolio()
fmt.Println("Portfolio ", portfolio)
but I'm getting an empty map as portfolio
hope you can help me, thank you so much