Umbraco-CMS/src/Umbraco.Web/Security/IUserSessionStore.cs

using System.Threading.Tasks;
using Microsoft.AspNetCore.Identity;

namespace Umbraco.Core.Security
{
    /// <summary>
    /// An IUserStore interface part to implement if the store supports validating user session Ids
    /// </summary>
    /// <typeparam name="TUser"></typeparam>
    public interface IUserSessionStore2<TUser> : IUserStore<TUser>
        where TUser : class
    {
        Task<bool> ValidateSessionIdAsync(string userId, string sessionId); // TODO: SB: Should take a user???
    }
}