Add mastodon service

roles/mattermost/tasks/main.yml

@@ -26,12 +26,6 @@
     line: '"DataSource": "postgres://{{ db_user }}:{{ db_pass }}@127.0.0.1:5432/{{ db_name }}?sslmode=disable&connect_timeout=10",'
     backrefs: yes
 
-- name: Create mattermost user
-  user:
-    name: "{{ mattermost_user }}"
-    system: yes
-    createhome: yes
-
 - name: Change mattermost directory permissions
   file:
     path: /opt/mattermost
@@ -75,7 +69,7 @@
 
 - name: ensure user does not have unnecessary privilege
   become: yes
-  become_user: "{{ mattermost_user }}"
+  become_user: "{{ username }}"
   postgresql_user:
     name: "{{ db_user }}"
     role_attr_flags: NOSUPERUSER,NOCREATEDB