Added Remember-Token to Authenticate

Renamed Authenticate to Authenticate2 and added remember-me support
Created Authenticate as wrapper for Authenticate2 for backwards
compat.

sessions.go

@@ -17,6 +17,7 @@ type User struct {
 type AuthData struct {
 	User         User   `json:"user"`
 	SessionToken string `json:"session-token"`
+	RememberToken string `json:"remember-token"`
 }
 
 type AuthResponse struct {
@@ -25,11 +26,18 @@ type AuthResponse struct {
 }
 
 // Authenticate authenticates the client with the Tastytrade API
-func (api *TastytradeAPI) Authenticate(username, password string) error {
+func (api *TastytradeAPI) Authenticate2(username, password string, remember bool) error {
+	var remStr string
+	if remember {
+		remStr = "true"
+	} else {
+		remStr = "false"
+	}
 	authURL := fmt.Sprintf("%s/sessions", api.host)
 	authData := map[string]string{
 		"login":    username,
 		"password": password,
+		"remember-me": remStr,
 	}
 	authBody, err := json.Marshal(authData)
 	if err != nil {
@@ -52,5 +60,12 @@ func (api *TastytradeAPI) Authenticate(username, password string) error {
 	}
 
 	api.authToken = authResponse.Data.SessionToken
+	if remember {
+		api.remToken  = authResponse.Data.RememberToken
+	}
 	return nil
 }
+
+func (api *TastytradeAPI) Authenticate(username, password string) error {
+	return api.Authenticate2(username, password, false)
+}