How to add phone number claim on IdentityServer4

Question

I am using IdentityServer4 IDP with a blazor client. In a razor component I have:

[CascadingParameter]
public Task<AuthenticationState> AuthenticationStateTask { get; set; }

async Task GetClaims()
{
    var claims = (await AuthenticationStateTask).User.Claims;
}

This gives me a total of 9 claims including sub, name, preferred_name, amr, email, email_verified etc. I want to also get the phone number here but it is not present even though I add phone scope in the IDP config as following

public static IEnumerable<IdentityResource> Ids =>
    new IdentityResource[]
    {
        new IdentityResources.OpenId(), // sub
        new IdentityResources.Profile(), // givenName, familyName ..
        new IdentityResources.Email(),
        new IdentityResources.Phone()
    };

and in Client object;

AllowedScopes = {
    IdentityServerConstants.StandardScopes.OpenId,
    IdentityServerConstants.StandardScopes.Profile,
    IdentityServerConstants.StandardScopes.Email,
    IdentityServerConstants.StandardScopes.Phone,
    "exampleapi" },

Doesn't this mean that the phone number should be in the identity token? What should I do to get the phone number?

Also, what is the best way to send a phoneNumberUpdate request?

Answer 1

Client Oidc service registration also needs to be configured to ask for phone scope

builder.Services.AddOidcAuthentication(options =>
{
    //...
    options.ProviderOptions.DefaultScopes.Add("phone");
    //...
});