Add auto_assign_org_id to defaults.ini

For #12801

conf/defaults.ini

@@ -213,6 +213,9 @@ allow_org_create = false
 # Set to true to automatically assign new users to the default organization (id 1)
 auto_assign_org = true
 
+# Set this value to automatically add new users to the provided organization (if auto_assign_org above is set to true)
+auto_assign_org_id = 1
+
 # Default role new users will be automatically assigned (if auto_assign_org above is set to true)
 auto_assign_org_role = Viewer