Microsoft.Graph.Models.ODataErrors.ODataError when doing Get Request to Microsoft Graph API

Question

Do not know how to solve the problem below

I cannot get a response from Microsoft Graph API. API works with some other requests. I was following instructions from these pages https://learn.microsoft.com/en-us/graph/tutorials/dotnet-app-only?tabs=aad but cannot make my own requests.

App permissions that are given and confirmed by admin:

• Application.Read.All
• Chat.Read.All
• Chat.ReadBasic.All
• Chat.ReadWrite.All
• Group.Read.All
• User.Read.All

I get ids of users with:

_ = _appClient ??
            throw new System.NullReferenceException("Graph has not been initialized for app-only auth");
var response = await _appClient.Users.GetAsync();

There are no exceptions, everything works (as I understand it must work). And then try to get all the chats from Microft Teams of the user using his id:

var response = await _appClient.Users[id].Chats.GetAsync();

Exception message and Stack Trace

Answer 1

I figured out what type of error it was with the help of ODataError class:

try
{
      var response = await _userClient.Me.Chats.GetAsync();
      return response;
}catch (ODataError er)
{
      Console.WriteLine(er.Error.Code);
      Console.WriteLine(er.Error.Message);
      return null;
}

Thanks)