*
* @return New OAuthTokenDetails instance containing the new access token,
* 'expires in' value, and refresh token.
*/
public OAuthTokenDetails refreshToken() throws CreateSendException {
OAuthTokenDetails result = null;
AuthenticationDetails auth = this.jerseyClient
.getAuthenticationDetails();
if (auth != null && auth instanceof OAuthAuthenticationDetails) {
OAuthAuthenticationDetails oauthDetails = (OAuthAuthenticationDetails) auth;
String body = "grant_type=refresh_token";