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bfinnegan7675
New Member

PowerBI Rest API C# throwing 'Operation returned an invalid status code 'Unauthorized''

Hey all,

 

I've been following some tutorials and am trying to access some reports from our Power BI instance. I can successfully authenticate and get a Bearer Auth token, but when using my PowerBIClient to try to communicate I get an Unauthorized error. 

 

Can someone tell me if what I am doing is wrong?

 

Any help to point me in the right direction would be awesome, thank you!

        public async Task<string> GetToken()
        {
            //The client id that Azure AD created when you registered your client app.
            try
            {
                System.Net.ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;

                List<string> scopes = new List<string>();
                scopes.Add("https://analysis.windows.net/powerbi/api/.default");

                var confidentialClient = ConfidentialClientApplicationBuilder
                           .Create("{my app ID from Azure"")
                           .WithClientSecret("{my client secret from azure}")
                           .WithAuthority(new Uri("https://login.microsoftonline.com/{my azure tenant ID}"))
                           .WithRedirectUri("https://localhost:44300/")
                           .Build();

                var accessTokenRequest = confidentialClient.AcquireTokenForClient(scopes);
                var authResult = await accessTokenRequest.ExecuteAsync();

                return authResult.AccessToken;
            }
            catch
            {
                throw;
            }
        }
        private async Task Authenticate()
        {
            if (_currentAccessToken == null)
            {
                var tokenCredentials = new TokenCredentials(await GetToken(), "Bearer");

                client = new PowerBIClient(new Uri("https://api.powerbi.com/"), tokenCredentials);

                _currentAccessToken = tokenCredentials;
            }
        }

 

public async Task<string> PostExportRequest(Guid reportId, Guid groupId, FileFormat format, IList<string> pageNames = null, string urlFilter = null)
        {
            try
            {
                var exportRequest = new ExportReportRequest
                {
                    Format = format
                };

                if(_currentAccessToken == null) 
                    await Authenticate();
                //also fails
                var groups = await client.Groups.GetGroupsAsync();
                //fails with unauthorized
                var export = await client.Reports.ExportToFileInGroupAsync(reportId, groupId, exportRequest);

                // Save the export ID, you'll need it for polling and getting the exported file
                return export.Id;
            }
            catch
            {
                throw;
            }
        }

 

3 REPLIES 3
bfinnegan7675
New Member

bfinnegan7675_0-1680629855943.png

 

 

My issue was that the API Permissions needed the Tenant.ReadAll and Tenant.WriteAll permissions in Azure AD.

 

Antriksh - I did try to change my ExecuteAsync() call to use the .Result but it was not working because it was throwing syntax errors. 

 

but the permission seems too high, need admin consent, is it essential, i meet the same unauthorized errror

AntrikshSharma
Community Champion
Community Champion

@bfinnegan7675 

var authResult = await accessTokenRequest.ExecuteAsync();

// This should be

var authResult = await accessTokenRequest.ExecuteAsync().Result;

 

Make sure that the app has access to workspaces, that's the issue I also faced, I created the application but didn't think of giving access to workspaces.

 

Also check if the required API Permissions are granted in Azure Appp Registrations.

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