gototp.go
func (totp *TOTP) QRCodeGoogleChartsUrl(label string, width int) string {
	return fmt.Sprintf("https://chart.googleapis.com/chart?cht=qr&chs=%vx%v&chl=%v", width, width, url.QueryEscape(totp.QRCodeData(label)))
}
func (totp *TOTP) QRCodeGoogleChartsUrl(label string, width int) string {
	return fmt.Sprintf("https://chart.googleapis.com/chart?cht=qr&chs=%vx%v&chl=%v", width, width, url.QueryEscape(totp.QRCodeData(label)))
}
func ( totp * TOTP ) QRCodeGoogleChartsUrl ( label string , width int ) string { return fmt . Sprintf ( " " , width , width , url . QueryEscape ( totp . QRCodeData ( label ) ) ) }
// Return a URL to generate a QRCode on Google Charts for the TOTP, with the given 
// label and width (and height equal to width).
Return a URL to generate a QRCode on Google Charts for the TOTP with the given label and width ( and height equal to width ) .