Fix colliding vars.

restapi.go

@@ -156,11 +156,11 @@ func (s *Session) Login(email, password string) (token string, err error) {
 
 // LoginWithToken will verify a login token, or return a new one if it is invalid.
 // This is the preferred way to login, as it uses less rate limiting quota.
-func (s *Session) LoginWithToken(email, password, token string) (token string, err error) {
+func (s *Session) LoginWithToken(email, password, token string) (newToken string, err error) {
 
 	old := s.Token
 	s.Token = token
-	token, err = s.Login(email, password)
+	newToken, err = s.Login(email, password)
 	s.Token = old
 
 	return