A couple questions, I'm updating an app to use the new API. Logging in as the user into the dropbox website and it doesn't look like there are any apps registered to this account. My App Key is 1cqi2t0vya3poem.
If you don't see your app(s) listed on the App Console, that means you're not signed in to the account that owns the app(s). You'll need to log out and then log back in to the account that does own the app(s).
If (and only if) you do have stored OAuth 1 access tokens (e.g., as returned by /1/oauth/access_token) that you want to migrate to OAuth 2 for use with API v2, you can use those, not request tokens, with /2/auth/token/from_oauth1.