Add basic logic for managing vaults

app/unit/SettingsUnit.js

@@ -37,6 +37,15 @@ class SettingsUnit extends Unit {
             this.output.debug(`Guarantee setting key "${key}" with default value "${default_value}".`)
             await Setting.guarantee(key, default_value)
         }
+
+        const Permission = this.models.get('iam:Permission')
+        const default_permissions = this.configs.get('auth.iam.default_permissions')
+        for ( const perm of default_permissions ) {
+            const existing = await Permission.findOne(perm)
+            if ( !existing ) {
+                await (new Permission(perm)).save()
+            }
+        }
     }
 }