Automate SPFX single sign on using C#

@Suresh Rajamani

Hello Suresh,

Thanks for reaching out.

You can leverage Microsoft identity platform and OAuth 2.0 Resource Owner Password Credentials flow to authenticate and get access_token for respective resource by using User credential.

To know more about ROPC (Resource Owner Password Credentials ) : https://video2.skills-academy.com/en-us/azure/active-directory/develop/v2-oauth-ropc
Scenarios and supported authentication flows: https://video2.skills-academy.com/en-us/azure/active-directory/develop/authentication-flows-app-scenarios#scenarios-and-supported-authentication-flows

I would recommend you to use Microsoft Authentication Libraries (MSAL) instead ADAL library which is in deprecation cycle. Please take a look at the sample apps that use MSAL.

Hope this helps.

Adding SharePoint Dev tags into this thread to get suggestion and expertise from SharePoint perspective.

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Hi @Suresh Rajamani ,
We can retrieve user AccessToken by using the OfficeDevPnP.Core library

static void Main(string[] args)  
{  
    string siteUrl = "https://tenant.sharepoint.com";  
    string userName = "user@tenant.onmicrosoft.com";  
    string Password = "********";  

    var accessToken = GetUserAuthToken(siteUrl,userName, Password);  
    Console.Read();  
}  

private static string GetUserAuthToken(string siteUrl, string userPrincipal, string Pwd)  
{  
    var authManager = new AuthenticationManager();  
    var context = authManager.GetAzureADCredentialsContext(siteUrl, userPrincipal, Pwd);  
    Console.WriteLine(context.GetAccessToken());  
    return context.GetAccessToken();  
}  

As sikumars-msft said the ADAL already Deprecated. We will recommend you to use MSAL
Please refer to following link
https://video2.skills-academy.com/en-us/azure/active-directory/develop/msal-net-acquire-token-silently

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