HttpUtils utils = injector.getInstance(HttpUtils.class);
Supplier<PrivateKey> privateKey = injector.getInstance(Key.get(new TypeLiteral<Supplier<PrivateKey>>() {
}));
signing_obj = new SignedHeaderAuth(new SignatureWire(),
Suppliers.ofInstance(new Credentials(USER_ID, PRIVATE_KEY)), privateKey, new Provider<String>() {
@Override
public String get() {
return TIMESTAMP_ISO8601;