Found the problem:
When I extend the Sonata\UserBundle\Entity\BaseUser
& Sonata\UserBundle\Entity\BaseGroup
I should not generate userbundle in Application namespace using app/console sonata:easy-extends:generate SonataUserBundle --dest=src
so new Application\Sonata\UserBundle\ApplicationSonataUserBundle(),
shouldn't be loaded in AppKernel.php
.
Instead in parameters.yml
I should add these:
sonata.user.admin.user.entity: ar1y4n\UserBundle\Entity\User
sonata.user.admin.group.entity: ar1y4n\UserBundle\Entity\Group
Now it works with users
table as ar1y4n\UserBundle\Entity\User
entity uses it.