validity of auth token in OAuth2 in SharePoint App Registration/ Azure AD app

Question

I have a SharePoint app registered in a site

To access the documents, I am getting the Auth Token from the below URL

https://accounts.accesscontrol.windows.net/{{realm}}/tokens/OAuth/2

What is the validity of the auth token that we get from this URL?

I am not able to find the validity of the token specified anywhere

Answer 1

Looks like its valid for a day

in the response, I get

"expires_in": "86399"

which is 24 hours.