Registers a new user on the LEX
        :rtype: None

def register(self, username, password, email, full_name):
        """
        Registers a new user on the LEX
        :rtype: None
        """
        if all([username, password, email, full_name]):
            r = requests.post(self._base + 'user/register', params={
                'username': username,
                'password_1': password,
                'password_2': password,
                'email': email,
                'fullname': full_name
            })
            r.raise_for_status()
        else:
            raise Exception('None of the arguments may be "None"')