code: function getEyesInstance() {
  
      if (global.eyesKey) {
  
          var eyes = new Eyes();
  
          // retrieve eyes api key from config file in the project root as defined by the user
          eyes.setApiKey(global.eyesKey);
  
          return eyes;
      }
  
      return null;
  }
docs: Initialize the eyes SDK and set your private API key via the config file.