Scheme for AuthSession

Hello,

I have integrated Linkedin login simillarly to the following logic process:

I noticed that I get a warning message that suggests to add scheme to the app.json.
I’m not sure how it’s supposed to be perfromed.
In addition, I have read in the docs about the scheme, from what I understand it’s supposed to be used for linking to other apps and not websites.

What is the scheme supposed to be in app.json?

Thank you.