code: @Override
  	public void unlink(final Context context, final SocializeDeAuthListener listener) {
  		// Clear the FB session
  		try {
  			new AsyncTask<Void, Void, Void>() {
  
  				@Override
  				protected Void doInBackground(Void... params) {
  					
  					try {
  						
  						SocializeSession session = getSocialize().getSession();
  						session.clear(AuthProviderType.FACEBOOK);
  						
  						UserSettings userSettings = session.getUserSettings();
  						
  						if(userSettings != null) {
  							userSettings.setAutoPostFacebook(false);
  						}
  						
  						userSystem.saveSession(context, session);	
  						
  						logout(context);
  						
  						if(listener != null) {
  							listener.onSuccess();
  						}
  					}
  					catch (Exception e) {
  						if(listener != null) {
  							listener.onError(SocializeException.wrap(e));
  						}
  					}
  					return null;
  				}
  			}.execute();
  		}
  		catch (Exception e) {
  			if(logger != null) {
  				logger.error("Error while logging out of Facebook", e);
  			}
  			else {
  				e.printStackTrace();
  			}
  		}		
  	}
docs: /* (non-Javadoc)
  @see com.socialize.networks.facebook.FacebookFacade#unlink(android.content.Context, com.socialize.networks.SocializeDeAuthListener)