Make maubot automatically create its own user.

group_vars/matrix_servers

@@ -5174,6 +5174,12 @@ matrix_user_creator_users_auto: |
       'initial_password': matrix_bot_buscarron_password,
       'initial_type': 'bot',
     }] if matrix_bot_buscarron_enabled else [])
+    +
+    ([{
+      'username': matrix_bot_maubot_login,
+      'initial_password': matrix_bot_maubot_initial_password,
+      'initial_type': 'bot',
+    }] if matrix_bot_maubot_enabled else [])
   }}
 
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