SuiteCRM-Core/config/routes.yaml

controllers:
    resource:
        path: ../core/backend/Controller/
        namespace: App\Controller
    type: attribute

auth_controllers:
    resource:
        path: ../core/backend/Authentication/Controller/
        namespace: App\Authentication\Controller
    type: attribute

engine_controllers:
    resource:
        path: ../core/backend/Engine/Controller/
        namespace: App\Engine\Controller
    type: attribute