oauthhelper

type Auth struct {
	// Token holds the token that should be used for authentication (optional)
	// if the token is nil the callback func Authenticate will be called and after Authorization this token will be set
	// Store (and restore prior use) this token to avoid further authorization calls
	Token *oauth2.Token
	// ClientID  from https://console.developers.google.com/project/<your-project-id>/apiui/credential
	ClientID string
	// ClientSecret  from https://console.developers.google.com/project/<your-project-id>/apiui/credential
	ClientSecret string
	Authenticate AuthenticateFunc
}

type AuthenticateFunc func(url string) (code string, err error)