[CHANGE] Simple cookie rotation post

Manager.YouTube/YouTubeClient.cs

@@ -202,6 +202,25 @@ public sealed class YouTubeClient : IDisposable
         return tempDatasyncId;
     }
 
+    public async Task<Result> RotateCookiesAsync()
+    {
+        if (IsAnonymous)
+        {
+            return ResultError.Fail("Anonymous clients cannot rotate cookies!");
+        }
+        
+        try
+        {
+            var rotateRequest = new HttpRequestMessage(HttpMethod.Post, new Uri("https://accounts.youtube.com/RotateCookies"));
+            var response = await HttpClient.SendAsync(rotateRequest);
+            return !response.IsSuccessStatusCode ? ResultError.Fail($"Cookies rotation failed, status code: {response.StatusCode}") : Result.Success();
+        }
+        catch (Exception e)
+        {
+            return ResultError.Error(e);
+        }
+    }
+
     public void Dispose()
     {
         HttpClient.Dispose();