possibility to define alternate user`s prime group

users/init.sls

   - users.sudo
 
 {% for name, user in pillar.get('users', {}).items() %}
-{% if user == None %}
-{% set user = {} %}
-{% endif %}
-{% set home = user.get('home', "/home/%s" % name) %}
+{%- if user == None -%}
+{%- set user = {} -%}
+{%- endif -%}
+{%- set home = user.get('home', "/home/%s" % name) -%}
+
+{%- if 'prime_group' in user and 'name' in user['prime_group'] %}
+{%- set user_group = user.prime_group.name -%}
+{%- else -%}
+{%- set user_group = name -%}
+{%- endif %}
 
 {% for group in user.get('groups', []) %}
 {{ group }}_group:
   file.directory:
     - name: {{ home }}
     - user: {{ name }}
-    - group: {{ name }}
+    - group: {{ user_group }}
     - mode: 0755
     - require:
       - user: {{ name }}
-      - group: {{ name }}
+      - group: {{ user_group }}
   group.present:
-    - name: {{ name }}
-    {% if 'uid' in user -%}
+    - name: {{ user_group }}
+    {%- if 'prime_group' in user and 'gid' in user['prime_group'] %}
+    - gid: {{ user['prime_group']['gid'] }}
+    {%- elif 'uid' in user %}
     - gid: {{ user['uid'] }}
-    {% endif %}
+    {%- endif %}
   user.present:
     - name: {{ name }}
     - home: {{ home }}
     - shell: {{ user.get('shell', '/bin/bash') }}
     {% if 'uid' in user -%}
     - uid: {{ user['uid'] }}
-    {% endif %}
+    {% endif -%}
+    {% if 'prime_group' in user and 'gid' in user['prime_group'] -%}
+    - gid: {{ user['prime_group']['gid'] }}
+    {% else -%}
     - gid_from_name: True
+    {% endif -%}
     {% if 'fullname' in user %}
     - fullname: {{ user['fullname'] }}
-    {% endif %}
+    {% endif -%}
     - groups:
-        - {{ name }}
-      {% for group in user.get('groups', []) %}
-        - {{ group }}
+      - {{ user_group }}
+      {% for group in user.get('groups', []) -%}
+      - {{ group }}
       {% endfor %}
     - require:
-        - group: {{ name }}
-      {% for group in user.get('groups', []) %}
-        - group: {{ group }}
+      - group: {{ user_group }}
+      {% for group in user.get('groups', []) -%}
+      - group: {{ group }}
       {% endfor %}
 
 user_keydir_{{ name }}:
   file.directory:
     - name: {{ user.get('home', '/home/{0}'.format(name)) }}/.ssh
     - user: {{ name }}
-    - group: {{ name }}
+    - group: {{ user_group }}
     - makedirs: True
     - mode: 744
     - require:
       - user: {{ name }}
-      - group: {{ name }}
-      {% for group in user.get('groups', []) %}
+      - group: {{ user_group }}
+      {%- for group in user.get('groups', []) %}
       - group: {{ group }}
-      {% endfor %}
+      {%- endfor %}
 
   {% if 'privkey' in user %}
 user_{{ name }}_private_key:
   file.managed:
     - name: {{ user.get('home', '/home/{0}'.format(name)) }}/.ssh/id_rsa
     - user: {{ name }}
-    - group: {{ name }}
+    - group: {{ user_group }}
     - mode: 600
     - source: salt://keys/{{ user['privkey'] }}
     - require: