How to make spring security ldap optional, and not validate in the database when activated.

Config.groovy

//activate or deactivate the plugin
grails.plugins.springsecurity.ldap.active=true


if(grails.plugins.springsecurity.ldap.active) {
  // specify this when you want to skip attempting to load from db and only use LDAP
  grails.plugins.springsecurity.providerNames = ['ldapAuthProvider', 'anonymousAuthenticationProvider'] 
}