Property 'auth' does not exist on type 'Dropbox'

Ha..🤣 You just found an imperfection out. 🤫

The 'auth' field is there, but for whatever reason is not declared in type script. 🤷 That's why your interpreter complains.

You can workaround as re-declare Dropbox and include the "missing" field or construct DropboxAuth object on your own, save a reference, and pass it on construction of Dropbox object - this.auth = new DropboxAuth({fetch, ...}); this.dbx = new Dropbox({auth}) (so instead of this.dbx.auth... you may use just this.auth...).

Hope this helps.