External website database share with Adalo app without creating pages on Adalo

I have a website built on Ontraport and I want to have it on App too whereby users will be able to login through Adalo App and next page will direct users to the website pages, how can i do that, whereby i won’t need to Create pages on Adalo because the website is already built on a webapp?
The website already is created with Webapp tech from ontraport.