prow/github/client.go
func (s *reloadingTokenSource) Token() (*oauth2.Token, error) {
	return &oauth2.Token{
		AccessToken: string(s.getToken()),
	}, nil
}
func (s *reloadingTokenSource) Token() (*oauth2.Token, error) {
	return &oauth2.Token{
		AccessToken: string(s.getToken()),
	}, nil
}
// Token is an implementation for oauth2.TokenSource interface.