Addition of Spell Checker

Hello Team,
I want to add Spell Checker because most of the users for my bot are typing spelling mistakes and so i want a spell checker.
My query is :
Once user types something , i want the text to pass through spell checker and then other pipelines
I have written the spell checker module
Where shall i integrate it in rasa and how because here we define all nlp pre-processing as pipelines kindly help

Hi Vivek! Because you want this to happen as the very first step in your pipeline, I’d recommend writing a custom NLU component. You can find a detailed walkthrough here: Custom NLU Components