docs: correct description

Co-authored-by: John Paul E. Balandan, CPA <paulbalandan@gmail.com>

Author: datamweb

docs/concepts.md

@@ -26,7 +26,7 @@ on the standard Config class if nothing is found in the database.
 
 You can use your own models to handle user persistence. Shield calls this the "User Provider" class. A default model
 is provided for you at `CodeIgniter\Shield\Models\UserModel`. You can change this in the `Config\Auth->userProvider` setting.
-The only requirement is that your new class MUST extend the provided `UserModel`. Shield has a CLI command to quickly create a custom `UserModel`, for example if you run the following command in terminal:
+The only requirement is that your new class MUST extend the provided `UserModel`. Shield has a CLI command to quickly create a custom `MyUserModel` by running the following command in terminal:
 
 ```console
 php spark shield:model MyUserModel