How to integrate my fuse-powered app to my web-based pin portal

Hello fuse programmers,i currently have a pin-portal/website where i generate pins/pin codes, i use these pins to gate my former app( written with android studio…now we have developed a similar app(like the former app)using fusetools, and we are facing difficulty integrating my pinportal to my fusetools app(under development)
this is what i have written so far.

also how do i make the pin-portal page of my app invisible any after the user has input the right pin. Even if the app is reloaded