La fonction de suggestion automatique permet d'affiner rapidement votre recherche en suggérant des correspondances possibles au fur et à mesure de la frappe.
One more note, when Postman pops open its browser window and presents the hubspot login screen I needed to select the "main" hubstpot account, that is the one used to review billing, reports and so on NOT the developer account which holds the newly created app and client id /secrets used in Postman. A little counter-intuitive since the app account is what I'm obtaining the acces_token and refresh_token for but once I guessed correctly all worked.
To clarify, you are actually receiving access and refresh tokens to the production account, not the developer account where your app lives. This mimics a user in a client account granting your app access to their tools and data. Developer accounts do not contain tools like the the website builder and email tool.