README.md in mongoid-shell-0.4.4 vs README.md in mongoid-shell-0.4.5

@@ -41,9 +41,18 @@
 ``` ruby
 mongodump = Mongoid::Shell::Commands::Mongodump.new(excludeCollection: %w(users products))
 system mongodump.to_s # mongodump --excludeCollection users --excludeCollection products
 ```
 
+To use output in logs, pass the `mask_sensitive` option to `to_s`.
+
+``` ruby
+> Mongoid::Shell::Commands::Mongo.new.to_s(mask_sensitive: true)
+ => "mongo 59.1.22.1:27017/mongoid --username user --password ********"
+
+> Mongoid::Shell::Commands::Mongo.new.to_s(mask_sensitive: '(masked)')
+ => "mongo 59.1.22.1:27017/mongoid --username user --password (masked)"
+```
 
 Compatibility
 -------------
 
 This gem supports Mongoid 3, 4, 5 and 6.