how to get store email when app installing - send the email for the app setup guide

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Hi all,

i have public app in node js,

i want to get store email when app installing - send the email for the app setup guide

i am using graphql API
https://shopify.dev/api/admin-graphql/2022-10/objects/Shop

{
shop
   {
    email,
    url
   }
}