Restrict user access to a specific project

Well it is solved, and works perfectly now, thanks ! A big thanks to @sylvainjule for his wonderful help and plugin. Using the latest version (1.0.2) of Bouncer, and the following files :

/site/blueprints/users/editor.yml

title: editor

permissions:
  access:
    panel: true
    site: true
    settings: false
    users: false
  # ...
  user:
    changeRole: false
    delete: false
    update: false # else a user will be able to edit the page they have access to on their profile

fields:
  canaccess:
    label: 'This user will only be able to access :'
    type: pages
    multiple: false
    options: query
    query: kirby.page('projets').children

and the config.php file :

// bouncer
'sylvainjule.bouncer.list' => [
    'editor' => [
        'fieldname' => 'canaccess'
    ]
],

Thank you very much !

j.