BgEngine.Security.Services.CodeFirstSecurity.GetUserId C# (CSharp) Method

        public static Guid GetUserId(string userName)
        {
            VerifyProvider();
            MembershipUser user = Membership.GetUser(userName);
            if (user == null)
            {
                return Guid.Empty;
            }
            return Guid.Parse(user.ProviderUserKey.ToString());
        }