make login a private method

questrade/client.go

@@ -88,11 +88,9 @@ func (c *client) processResponse(res *http.Response, out interface{}) error {
 // and exchanges it for an access token. Returns a timer that
 // expires when the login session is over.
 // TODO - Return a proper error when login fails with HTTP 400 - Bad Request
-func (c *client) Login() error {
-	login := loginServerURL
-
+func (c *client) login() error {
 	vars := url.Values{"grant_type": {"refresh_token"}, "refresh_token": {c.Credentials.RefreshToken}}
-	res, err := c.httpClient.PostForm(login+"token", vars)
+	res, err := c.httpClient.PostForm(loginServerURL+"token", vars)
 
 	if err != nil {
 		return err
@@ -126,7 +124,7 @@ func newClient(refreshToken string) (*client, error) {
 		transport:  transport,
 	}
 
-	err := c.Login()
+	err := c.login()
 	if err != nil {
 		return nil, err
 	}