Passing access token into app store install?

Hi All,

I have an ionic app that I plan to push to iOS and Android app stores. A website currently exists where users can log in (giving them an access token).

Ideally I would like to achieve a user flow where logged in users on the website can click a link to install the iOS/android app, with their access token string being passed as a parameter to App Store/Google Play store so that once they open the app, the app can automatically log them in using their access token from the website.

[1] Is it possible to pass a parameter to the app stores and have access to this parameter on first launch?
[2] Is it secure (parameter sent over HTTPs) ?

Many thanks!