Unable to import Spring Security #Secured Annotation into Grails 3 - spring

Question

I am currently following the Spring Security 3.0.0.M1 plugin tutorial for Grails here and I appear to be stuck on Step 8. Using the statement import grails.plugin.springsecurity.annotation.Secured does not work because Grails cannot resolve the package name. I know that Spring Security for Grails 3 is in its infancy, but has anyone been able to get past this step yet? For reference, here is my SecureController class (with a another import that also does not work):
package ldaptest.controllers
import grails.plugin.springsecurity.annotation.Secured;
import org.springframework.security.access.annotation.Secured;
#Secured('ROLE_ADMIN')
class SecureController {
def index() {
render 'Secure access only'
}
}

Answer 1

I may found a solution:
Create a "lib" folder e.g. inside your "grails-app" directory.
Download the SpringSecurityCore JAR from here and move it into the lib directory
Add gradle dependency:
compile files('lib/spring-security-core-3.0.0.M1.jar')
Hope this helps.
Greetings

Answer 2

I had:3,1,1 the save problem with my application. I solved it by adding as a library to my project. However I had to change import package to make it work.
import org.springframework.security.access.annotation.Secured
I am using IntelliJ IDEA, I just has to search the maven repo for the spring-security-core:3.1.1.
In IntelliJ you do : File > Project Structure > Libraries > Add > From Maven Repository. Then do the search according to the version of "spring-security-core" you want to use.