solution

ansible_apache_formation/tasks/apache.yml

@@ -4,6 +4,9 @@
     name: "{{ apache_package_name }}"
     state: present
 
+- name: include data in vault
+  include_vars: vault.yml
+
 - name: configuration
   notify: reload httpd
   template:
@@ -46,7 +49,7 @@
   htpasswd:
     path: "/etc/httpd/passwd"
     name: tom
-    password: "123Soleil"
+    password: "{{ apache_password }}""
     mode: 0640
     owner: root
     group: "apache"