private PayPalOAuthScopes getOauthScopes() {
/* create the set of required scopes
* Note: see https://developer.paypal.com/docs/integration/direct/identity/attributes/ for mapping between the
* attributes you select for this app in the PayPal developer portal and the scopes required here.
*/
HashSet<string> scopes = new HashSet<string> ();
scopes.Add (PayPalOAuthScopes.PaypalScopeEmail);
scopes.Add (PayPalOAuthScopes.PaypalScopeAddress);
return new PayPalOAuthScopes (scopes.ToList ());
}