Cannot create Push Dataset in Group

Hello,

I am trying to create a Dataset using Power BI API.

As Datasource I want to chose the OData Query from Business Central.

However, OData requires credentials, and I am not sure where I can provide them.

I am using the code from "Embed for Customers" example and Service Principal as authentication method.

Will provide some of the code below (some lines are commented out since I am experimenting):

public async Task AddDatasetAsync(Guid workspaceId, AddDatasetDto datasetDto)
        {
            using (var pbiClient = await GetPowerBiClient())
            {
                var request = new CreateDatasetRequest
                {
                    Datasources = new List<Datasource>
                    {
                        new Datasource
                        {
                            //ConnectionDetails = new DatasourceConnectionDetails(),
                            //ConnectionString = datasetDto.ConnectionString,
                            DatasourceType = "OData",
                            Name = "Dynamics365BusinessCentral",
                            ConnectionDetails = new DatasourceConnectionDetails
                            {
                                //Database = datasetDto.Database,
                                //Server = datasetDto.Server,
                                Url = datasetDto.Url
                            }
                        }
                    },
                    //DefaultMode = DatasetMode.Streaming,
                    Name = datasetDto.DatasetName,
                    Tables = new List<Table>()
                    //Tables = new List<Table>
                    //{
                    //    new Table
                    //    {
                    //        Source = new List<ASMashupExpression>
                    //        {
                    //            new ASMashupExpression
                    //            {
                    //                Expression = ""
                    //            }
                    //        }
                    //    }
                    //}
                };

                await pbiClient.Datasets.PostDatasetInGroupAsync(workspaceId, request);
            }
        }

The client itself is:

public async Task<PowerBIClient> GetPowerBiClient()
        {
            var tokenCredentials = new TokenCredentials(await aadService.GetAccessToken(), "Bearer");
            return new PowerBIClient(new Uri(urlPowerBiServiceApiRoot), tokenCredentials);
        }

I am trying to post a Dataset by providing "Url" property, in which I put OData query link.

However, every time I try to post a Dataset I get "BadRequest" error.

Clearly I do not specify credentials (it's using Basic Auth - Web Access Key).

Could you help with this issue?