make private if not part of provider interface

providers/questrade/client.go

@@ -12,7 +12,7 @@ import (
 
 const loginServerURL = "https://login.questrade.com/oauth2/"
 
-type LoginCredentials struct {
+type loginCredentials struct {
 	AccessToken  string `json:"access_token"`
 	TokenType    string `json:"token_type"`
 	ExpiresIn    int    `json:"expires_in"`
@@ -24,7 +24,7 @@ type LoginCredentials struct {
 // endpoints. It holds the login credentials, http client/transport,
 // rate limit information, and the login session timer.
 type client struct {
-	Credentials        LoginCredentials
+	Credentials        loginCredentials
 	SessionTimer       *time.Timer
 	RateLimitRemaining int
 	RateLimitReset     time.Time
@@ -34,7 +34,7 @@ type client struct {
 
 // authHeader is a shortcut that returns a string to be placed
 // in the authorization header of API calls
-func (l LoginCredentials) authHeader() string {
+func (l loginCredentials) authHeader() string {
 	return l.TokenType + " " + l.AccessToken
 }
 
@@ -117,7 +117,7 @@ func newClient(refreshToken string) (*client, error) {
 
 	// Create a new client
 	c := &client{
-		Credentials: LoginCredentials{
+		Credentials: loginCredentials{
 			RefreshToken: refreshToken,
 		},
 		httpClient: httpClient,