Création des ACL

etc/acl.xml

+<?xml version="1.0"?>
+<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Acl/etc/acl.xsd">
+    <acl>
+        <resources>
+            <resource id="Magento_Backend::admin">
+                <resource id="NicolasBejean_CategoryWidget::global" title="Category Widget" translate="true" sortOrder="56">
+                    <resource id="NicolasBejean_CategoryWidget::add" title="Add New Category Widget" translate="true" sortOrder="10" />
+                    <resource id="NicolasBejean_CategoryWidget::delete" title="Delete an Category Widget" translate="true" sortOrder="20" />
+                </resource>
+            </resource>
+        </resources>
+    </acl>
+</config>