public override bool ChangePassword(string username, string oldPassword, string newPassword)
        {
            //throw new NotImplementedException();
            if (ValidateUser(username, oldPassword))
            {
                //var userObj = new User { UserName = username, Password = GetMd5Hash(newPassword), UserEmailAddress = email };

                using (var usersContext = new UsersContext())
                {
                    return(usersContext.ChangePassword(username, GetMd5Hash(newPassword)));
                }
            }
            else
            {
                return(false);
            }
        }