Allow matrix_user_uid/matrix_user_gid to be specified manually

roles/matrix-base/tasks/setup_matrix_user.yml

@@ -3,6 +3,7 @@
 - name: Ensure Matrix group is created
   group:
     name: "{{ matrix_user_groupname }}"
+    gid: "{{ omit if matrix_user_gid is none else matrix_user_gid }}"
     state: present
   register: matrix_group
 
@@ -13,6 +14,7 @@
 - name: Ensure Matrix user is created
   user:
     name: "{{ matrix_user_username }}"
+    uid: "{{ omit if matrix_user_uid is none else matrix_user_uid }}"
     state: present
     group: "{{ matrix_user_groupname }}"
   register: matrix_user

roles/matrix-base/tasks/validate_config.yml

@@ -1,11 +1 @@
 ---
-
-- name: (Deprecation) Warn about unused user/group variables
-  fail:
-    msg: >
-      The `{{ item }}` variable defined in your configuration is not used by this playbook anymore.
-      User/group creation is now dynamic. You can remove these variables from your configuration, as they have no effect on anything.
-  when: "item in vars"
-  with_items:
-    - 'matrix_user_uid'
-    - 'matrix_user_gid'