PluggableCQAuthHandler.java

//Import
import org.osgi.framework.ServiceRegistration;
import org.apache.sling.auth.core.spi.AuthenticationHandler;
import org.apache.sling.auth.core.spi.DefaultAuthenticationFeedbackHandler;

//Your Custom Auth handler class
public class CustomAuthHandler extends DefaultAuthenticationFeedbackHandler implements AuthenticationHandler {
//All Your Logic
private ServiceRegistration loginModule;
//All Your Logic
  @Activate
  protected void activate(ComponentContext componentContext) {
    context = componentContext;
    this.loginModule = null;
    try {
      this.loginModule = CustomPluggableLoginModule.register(this, componentContext.getBundleContext());
    } catch (Throwable t) {
      //Error handling
    }

  }

  @Deactivate
  protected void deactivate(@SuppressWarnings("unused") ComponentContext componentContext) {
    if (loginModule != null) {
      loginModule.unregister();
      loginModule = null;
    }
  }
}