An individual server side user credential
 /// <summary>
 /// Adds the specified user to the credentials database.
 /// </summary>
 /// <param name="username"></param>
 public void AddUser(string username)
 {
     var user = new CertificateUserCredential(username);
     lock (m_users)
     {
         m_users.Add(user.UserID, user);
     }
 }
        /// <summary>
        /// Adds the specified user to the credentials database.
        /// </summary>
        /// <param name="username"></param>
        public void AddUser(string username)
        {
            var user = new CertificateUserCredential(username);

            lock (m_users)
            {
                m_users.Add(user.UserID, user);
            }
        }