code: function(callback) {
          request.get(this.getUserUrl(), function(err, res, body) {
              if (body && body.lastModified) {
                  body.lastModified = new Date(body.lastModified);
              }
  
              if (body && !body.user && body.publicKey) {
                  body.user = body.publicKey;
              }
  
              callback(err, body, res);
          });
  
          return this;
      }
docs: Fetch the user info of the current user
  
  @param {Function} callback
  @return {ImboClient}