REST API Get Access Token

Hi allan_oliveira 

Before you use Rest API to get access token, you need to registered a client app in Azure AD. Every portal has its url to get access token. The resource url for Power BI API is "https://analysis.windows.net/powerbi/api". Then you need to add parameter into your code body, like your Client ID( from your app) or your account and password.

Here I will show you two ways to get Power BI access token.

1. Get access token by Postman.

For reference:  Solved: Power BI REST API using postman - generate embed t... - Microsoft Power BI Community

2. Try this code to get access token in visual studio by C#.

For reference: Get an authentication access token

using System;
using Microsoft.IdentityModel.Clients.ActiveDirectory;

namespace walkthrough_push_data
{
    class Program
    {
        private static string token = string.Empty;

        static void Main(string[] args)
        {

            //Get an authentication access token
            token = GetToken();

        }

        #region Get an authentication access token
        private static async Task<string> GetToken()
        {
            // TODO: Install-Package Microsoft.IdentityModel.Clients.ActiveDirectory -Version 2.21.301221612
            // and add using Microsoft.IdentityModel.Clients.ActiveDirectory

            //The client id that Azure AD created when you registered your client app.
            string clientID = "{Client_ID}";

            //RedirectUri you used when you register your app.
            //For a client app, a redirect uri gives Azure AD more details on the application that it will authenticate.
            // You can use this redirect uri for your client app
            string redirectUri = "https://login.live.com/oauth20_desktop.srf";

            //Resource Uri for Power BI API
            string resourceUri = "https://analysis.windows.net/powerbi/api";

            //OAuth2 authority Uri
            string authorityUri = "https://login.microsoftonline.com/common/";

            //Get access token:
            // To call a Power BI REST operation, create an instance of AuthenticationContext and call AcquireToken
            // AuthenticationContext is part of the Active Directory Authentication Library NuGet package
            // To install the Active Directory Authentication Library NuGet package in Visual Studio,
            //  run "Install-Package Microsoft.IdentityModel.Clients.ActiveDirectory" from the nuget Package Manager Console.

            // AcquireToken will acquire an Azure access token
            // Call AcquireToken to get an Azure token from Azure Active Directory token issuance endpoint
            AuthenticationContext authContext = new AuthenticationContext(authorityUri);
            var token = authContext.AcquireTokenAsync(resourceUri, clientID, new Uri(redirectUri)).Result.AccessToken;

            Console.WriteLine(token);
            Console.ReadLine();

            return token;
        }

        #endregion

    }
}

Best Regards,

Rico Zhou

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