diff --git a/app/src/main/java/com/github/restclient/MainActivity.java b/app/src/main/java/com/github/restclient/MainActivity.java
index 97128ce..14d19ae 100644
--- a/app/src/main/java/com/github/restclient/MainActivity.java
+++ b/app/src/main/java/com/github/restclient/MainActivity.java
@@ -29,7 +29,7 @@ protected void onCreate(Bundle savedInstanceState) {
         StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
         StrictMode.setThreadPolicy(policy);
 
-        initRestClient();
+        initRestClientWithCP();
 
         findViewById(R.id.buttonSimpleCall).setOnClickListener(view -> {
             callSimpleApi();
@@ -41,13 +41,40 @@ protected void onCreate(Bundle savedInstanceState) {
     }
 
     private void initRestClient() {
+
+        ArrayMap<String, String> header = new ArrayMap<>();
+
+        String clientId = "c3bdf6c5-508f-48ae-9af4-243a24072e31";
+
+        String clientSecret = "LnDbEo3yDDcswKMC3h4H";
+
+        String site = "https://sandbox.vaslapp.com";
+
+        String userName = "android-XoaM8ODAYVcKnB16ob8N";
+
+        String passWord = "DOI0qOIa0KT6ViYmS1k6";
+
+        header.put("Content-Type", "application/x-www-form-urlencoded");
+
+        restClient = new RestClient
+                .Builder(this)
+                .setAuthorizationBasic(userName, passWord)
+                .setAuthorizationOauth2(site + "/oauth/token", clientId, clientSecret)
+                .setDebugEnable(true)
+                .setHeader(header)
+                .setConnectionTimeOut(15000)
+                .build();
+    }
+
+    private void initRestClientWithCP() {
+
         ArrayMap<String, String> header = new ArrayMap<>();
 
         String clientId = "c3bdf6c5-508f-48ae-9af4-243a24072e31";
 
         String clientSecret = "LnDbEo3yDDcswKMC3h4H";
 
-        String site = "http://sandbox.vaslapp.com";
+        String site = "https://sandbox.vaslapp.com";
 
         String userName = "android-XoaM8ODAYVcKnB16ob8N";
 
@@ -55,10 +82,17 @@ private void initRestClient() {
 
         header.put("Content-Type", "application/x-www-form-urlencoded");
 
-        restClient = new RestClient.Builder(this)
-                .setAuthorizationOauth2("https://accounts.spotify.com/api/token", clientId, clientSecret)
+        ArrayMap<String, String> CPKArray = new ArrayMap<>();
+        CPKArray.put("sandbox.vaslapp.com", "sha256/AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=");
+
+        restClient = new RestClient
+                .Builder(this)
+                .setAuthorizationBasic(userName, passWord)
+                .setAuthorizationOauth2(site + "/oauth/token", clientId, clientSecret)
                 .setDebugEnable(true)
                 .setHeader(header)
+                .setCPKArray(CPKArray)
+                .setConnectionTimeOut(15000)
                 .build();
     }
 
@@ -90,6 +124,29 @@ public void onFailure(int errorCode, String errorMsg) {
     }
 
     private void callCPApi() {
+        RequestParams params = new RequestParams(RequestBodyType.FormData);
+        restClient.GET("https://sandbox.vaslapp.com/cache",
+                "",
+                new ResponseJsonHandler() {
+                    @Override
+                    protected void onSuccess(JSONObject result) {
+                        Log.d(TAG, "response " + result);
+                    }
+
+                    @Override
+                    protected void onSuccess(JSONArray result) {
+                        Log.d(TAG, "response " + result);
+                    }
 
+                    @Override
+                    protected void onSuccess(String result) {
+                        Log.d(TAG, "response " + result);
+                    }
+
+                    @Override
+                    public void onFailure(int errorCode, String errorMsg) {
+                        Log.d(TAG, "onFailure " + errorMsg);
+                    }
+                });
     }
 }
diff --git a/library/src/main/java/com/github/library/BaseClient.java b/library/src/main/java/com/github/library/BaseClient.java
index 84fafa7..ac5baab 100644
--- a/library/src/main/java/com/github/library/BaseClient.java
+++ b/library/src/main/java/com/github/library/BaseClient.java
@@ -61,7 +61,7 @@ static synchronized OkHttpClient getClient(int timeOut, boolean enableDebug) {
                     .connectTimeout(timeOut, TimeUnit.MILLISECONDS);
 
             if (enableDebug)
-                instanceBuilder = instance.newBuilder().addInterceptor(new LoggingInterceptor());
+                instanceBuilder.addInterceptor(new LoggingInterceptor());
 
             if (certificatePinner != null)
                 instanceBuilder.certificatePinner(certificatePinner);