package aimerror import "github.com/pkg/errors" func FetchingUser(err error, screen_name string) error { return errors.Wrapf(err, "could not fetch user with screen_name %s", screen_name) } func UserNotFound(screen_name string) error { return errors.Errorf("no user with UIN %s", screen_name) } var NoUserInSession = errors.New("no user in session")