private SessionModel CreateSessionCookie(UserModel user)
{
var session = SessionModel.CreateSession();
var cookieOptions = SessionModel.CreateCookieOptions(session);
Response.Cookies.Append("session", session.Id.ToString(), cookieOptions);
session.UserId = user.Id;
user.sessionsId = new ObjectId[] { session.Id };
Database.InsertDocument(session);
return(session);
}