public String mustBeGetMethod(@QueryParam("oauth_token") String token) {
System.out.println("Token received from user: " + token);
final DefaultOAuth1Provider defProvider = (DefaultOAuth1Provider) provider;
Assert.assertEquals("http://consumer/callback/homer", defProvider.getRequestToken(token).getCallbackUrl());
final String verifier = defProvider.authorizeToken(
defProvider.getRequestToken(token),
new UserPrincipal("homer"),
Sets.newHashSet("user"));
return verifier;
}