public List<UserAuthenticationType> getOrderedUserTypes() {
    return orderedUserTypes;
  }
Gets the list of {@link UserAuthenticationType}s (in preference order) to use to look up uer accounts in the Ambari database.

@return a list of {@link UserAuthenticationType}s
ambari-server/src/main/java/org/apache/ambari/server/security/authentication/kerberos/AmbariKerberosAuthenticationProperties.java