Ionic 4 - How to autofill username/password for Login Page of embedded website?

Hi all,

I have embedded a website inside my ionic 4 app.

However, I would like to autofill username/password for Login Page of this embedded website.

Original Flow:
Open Mobile App -> Enter Username/Password Manually in Login Page -> Home Page

Proposed Flow:
Open Mobile App -> Enter Username/Password Automatically Via Autofill In Login Page -> Home Page

In simple means, after user open mobile app, it will directly jumps into Home Page, bypass Login Page.

How should I code to achieve this flow?

Thanks.