ctx.credentials(/* intentionally blank -> */"", "yourapikey");
DynMessagingApi dyn = ctx.buildApi(DynMessagingApi.class);
SendMailApi send = dyn.getSendMailApi();
System.out.println("send : "
+ send.sendMessage("fromperson@example.org",
"recipient@example.org", "the subject", "hi text",
"<p>hi html</p>", "ccuser@example.org",
"reply-to@example.org", null));
AccountsApi accounts = dyn.getAccountsApi();