mws.backend.dotnet/api/ClaimsExtensions.cs

using System.Security.Claims;
using Microsoft.IdentityModel.JsonWebTokens;

namespace mws.backend.dotnet.api;

public static class ClaimsExtensions
{
    public static Guid GetUserId(this ClaimsPrincipal principal)
    {
        var value = principal.FindFirstValue(JwtRegisteredClaimNames.Sub)
            ?? principal.FindFirstValue(ClaimTypes.NameIdentifier)
            ?? principal.FindFirstValue("sub");
        if (value is not null && Guid.TryParse(value, out var id))
        {
            return id;
        }
        throw new UnauthorizedAccessException("Invalid user identity");
    }
}