Allow anonymous access by programmatically creating a user with AADB2C

[christiannagel]

• with the users API, add an API to create a new user with an anon-xx username with B2C
• add this option to the Blazor client
• create background functionality to cleanup non-active anon users when not active for TBD days

This should be possible with Graph (CoPilot):

using Microsoft.Graph;
using Microsoft.Identity.Client;

var clientId = "YOUR_CLIENT_ID";
var clientSecret = "YOUR_CLIENT_SECRET";
var tenantId = "YOUR_TENANT_ID";

IConfidentialClientApplication confidentialClientApplication = ConfidentialClientApplicationBuilder
    .Create(clientId)
    .WithTenantId(tenantId)
    .WithClientSecret(clientSecret)
    .Build();

ClientCredentialProvider authProvider = new ClientCredentialProvider(confidentialClientApplication);
GraphServiceClient graphClient = new GraphServiceClient(authProvider);

var user = new User
{
    AccountEnabled = true,
    DisplayName = "John Doe",
    MailNickname = "johndoe",
    UserPrincipalName = "johndoe@yourtenant.onmicrosoft.com",
    PasswordProfile = new PasswordProfile
    {
        ForceChangePasswordNextSignIn = true,
        Password = "TempP@ssw0rd!"
    }
};

await graphClient.Users
    .Request()
    .AddAsync(user);

But don't require a password change!