Create login_with_rft.ino

examples/Login with refresh token/login_with_rft.ino

@@ -0,0 +1,25 @@
+#include <Arduino.h>
+#include <WiFi.h>
+#include "SpotifyESP32.h"
+#include "config.h"
+using namespace Spotify_types;
+
+Spotify sp(CLIENT_ID, CLIENT_SECRET, REFRESH_TOKEN);
+void setup() {
+    Serial.begin(115200);
+    connect_to_wifi();
+}
+
+void loop() {
+    // put your main code here, to run repeatedly:
+}
+void connect_to_wifi(){
+    WiFi.begin(SSID, PASSWORD);
+    Serial.print("Connecting to WiFi...");
+    while (WiFi.status() != WL_CONNECTED) {
+        delay(1000);
+        Serial.print(".");
+    }
+    Serial.printf("\nConnected to WiFi\n");
+}
+