code: function(verificationId) {
      return new Promise((resolve, reject) => {
        this._start()
            .uri('/api/user/verify-email')
            .urlSegment(verificationId)
            .post()
            .go(this._responseHandler(resolve, reject));
      });
    }
docs: Confirms a email verification. The Id given is usually from an email sent to the user.
  
  @param {string} verificationId The email verification id sent to the user.
  @return {Promise} A Promise for the Passport call.