如何更改Grails spring-security-ldap:2.0.1插件以使用定制的AuthoritiesPopulator？

import org.springframework.security.core.GrantedAuthority
import org.springframework.security.ldap.userdetails.LdapAuthoritiesPopulator
import org.springframework.security.ldap.userdetails.UserDetailsContextMapper
import org.springframework.security.ldap.userdetails.UserDetailsContextMapperImpl
import org.springframework.security.ldap.userdetails.UserDetailsMapper

class CustomAuthoritiesPopulator implements LdapAuthoritiesPopulator {

    UserDetailsMapper userDetailsMapper = new UserDetailsContextMapperImpl() as UserDetailsMapper

    @Override
    List<GrantedAuthority> getGrantedAuthorities(DirContextOperations user, String username) {
        // 自定义授权逻辑
        // 返回一个包含用户权限的GrantedAuthority列表
    }
}

beans = {
    customAuthoritiesPopulator(CustomAuthoritiesPopulator)
}

ldapAuthProvider(org.springframework.security.ldap.authentication.LdapAuthenticationProvider) {
    ...
    userDetailsContextMapper = ref('customAuthoritiesPopulator')
    ...
}