Not able to fetch the status of user from Teams using graph client

Hi,

We are working on a bot framwerk project where we need to update our bot status based on the status in the ms teams (like available, un available, in a meeting).

We have used the below code for getting the status,

try
            {
                var clientId = "#client id";
                var clientSecret = "# client secret";
                var tenantId = "# tenant id";

                string authority = $"https://login.microsoftonline.com/{tenantId}";
                string scope = "https://graph.microsoft.com/.default";

                IConfidentialClientApplication app = ConfidentialClientApplicationBuilder
                    .Create(clientId)
                    .WithClientSecret(clientSecret)
                    .WithAuthority(new Uri(authority))
                    .Build();

                string[] scopes = new[] { scope };


                AuthenticationResult result = await app.AcquireTokenForClient(scopes)
                    .ExecuteAsync();

                string accessToken = result.AccessToken;

                // Create a GraphServiceClient instance using the obtained access token
                GraphServiceClient graphClient = new GraphServiceClient(
                    new DelegateAuthenticationProvider(requestMessage =>
                    {
                        requestMessage.Headers.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", accessToken);
                        return Task.FromResult(0);
                    }));

                // Use the graphClient to make requests to Microsoft Graph API
                var user = await graphClient.Users[emailId].Presence.Request().GetAsync();

            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "------------- There was an error while getting  status");
            }

But in this code we are passing the default scope. In the actual app registration we have added the graph client permission for 'PRESENSE.READ' and while trying to get the user Presence feature, its throwing a error because of no permission .

So explicitly we have assigned the token which has right permission and tried to fetch the status , but still the availability is shown "PRESENSE UNKNOWN" where the user status was Available.

It will be good if you can help with use on adding the exact scopes of the particular app registration in code and also need to fetch the correct status of user.