Accessing Microsoft Graph API without using login page

Question

I would like to access a user\'s one drive to upload a document or retrieve a document using Graph API. I\'ve seen multiple examples over the net which requires using the st

Answer 1

I've found the documentation is not helpful, especially in terms of trying to acces the Graph API in the application context. But, I managed to get the access token in the context of the application here:

private static async Task AcquireToken()
{
    var tenant = "yourtenant.onmicrosoft.com";
    var resource = "https://graph.microsoft.com/";
    var instance = "https://login.microsoftonline.com/";
    var clientID = "YourappID";
    var secret = "YourAppSecret";
    var authority = $"{instance}{tenant}";
    var authContext = new AuthenticationContext(authority);
    var credentials = new ClientCredential(clientID, secret);
    var authResult = await authContext.AcquireTokenAsync(resource, credentials);
    return authResult.AccessToken;
}