Converting JSON object to C# object

I have the following JSON object and I have been trying to convert it to a datatype, say MessageData in C#, but I keep getting this error:

RuntimeBinderException: The best overloaded method match for ‘Newtonsoft.Json.JsonConvert.DeserializeObject<InstgramApiPro.Models.Root>(string)’ has some invalid arguments

The JSON is as follows:

{
  "username": "instagram",
  "user_id": "222",
  "API": "Backup",
  "story_by_id": "null",
  "stories": [
    {
      "media": "...",
      "Type": "Story-Video",
      "thumbnail": "..."
    },
    {
      "media": "...",
      "Type": "Story-Video",
      "thumbnail": "..."
    }
  ],
  "avatar": "will be added soon"
}

MessageResponse looks like this:

public class Root
{
    public string username { get; set; }
    public string user_id { get; set; }
    public string API { get; set; }
    public string story_by_id { get; set; }
    public List<Story> stories { get; set; }
    public string avatar { get; set; }
}

public class Story
{
    public string media { get; set; }
    public string Type { get; set; }
    public string thumbnail { get; set; }
}

This is how I am trying to deserialize it:

var body = await response.Content.ReadAsStringAsync();
var json = JsonConvert.DeserializeObject<dynamic>(body);
var myDeserializedClass = JsonConvert.DeserializeObject<Root>(json);

Please I need help on how to successfully convert this into messageResponse data.

I’m running it on ASP.NET Core 6

Thank you