code: def register(self, email, full_name, password, **kwargs):
          
          params = {
              'email': email,
              'full_name': full_name,
              'password': password
          }
          return self._post('register', params, **kwargs)
docs: Register a new Todoist user.
  
          :param email: The user's email.
          :type email: str
          :param full_name: The user's full name.
          :type full_name: str
          :param password: The user's password.
          :type password: str
          :param lang: The user's language.
          :type lang: str
          :param timezone: The user's timezone.
          :type timezone: str
          :return: The HTTP response to the request.
          :rtype: :class:`requests.Response`
  
          >>> from pytodoist.api import TodoistAPI
          >>> api = TodoistAPI()
          >>> response = api.register('john.doe@gmail.com', 'John Doe',
          ...                         'password')
          >>> user_info = response.json()
          >>> full_name = user_info['full_name']
          >>> print(full_name)
          John Doe