@Override
  protected void configure(AuthenticationManagerBuilder authenticationManagerBuilder) {
    authenticationManagerBuilder.parentAuthenticationManager(authenticationManager);
  }
Configures Pulse to use the authentication manager defined by the
{@code pulse-authentication-custom.xml} file, which <em>must</em> define an authentication
manager. This configuration is applied when the {@code pulse.authentication.custom} profile is
active.
geode-pulse/src/main/java/org/apache/geode/tools/pulse/internal/security/CustomSecurityConfig.java