Bundle provides UI section for MF that makes it possible to manage users/groups/permissions.
Add this dependency to your composer.json:
"modera/backend-security-bundle": "~2.0"
Update your AppKernel class and add this:
new Modera\BackendSecurityBundle\ModeraBackendSecurityBundle(),
This bundle is under the MIT license. See the complete license in the bundle: Resources/meta/LICENSE