docs: def create_lead(self, first_name, last_name, email=None, position=None,
                      company=None, company_industry=None, company_size=None,
                      confidence_score=None, website=None, country_code=None,
                      postal_code=None, source=None, linkedin_url=None,
                      phone_number=None, twitter=None, leads_list_id=None):
          """
          Create a lead on your account.
  
          :param first_name: The first name of the lead to create. Must be
          defined.
  
          :param last_name: The last name of the lead to create. Must be defined.
  
          :param email: The email of the lead to create.
  
          :param position: The professional position of the lead to create.
  
          :param company: The company of the lead to create.
  
          :param company_industry: The type of industry of the company where the
          lead works.
  
          :param company_size: The size of the company where the lead works.
  
          :param confidence_score: The confidence score of the lead's email.
  
          :param website: The website of the lead's company.
  
          :param country_code: The country code of the lead's company.
  
          :param postal_code: The postal code of the lead's company.
  
          :param source: The source of the lead's email.
  
          :param linkedin_url: The URL of the lead's LinkedIn profile.
  
          :param phone_number: The phone number of the lead to create.
  
          :param twitter: The lead's Twitter account.
  
          :param leads_list_id: The id of the leads list where to save the new
          lead.
  
          :return: The newly created lead as a dict.
          """
          args = locals()
          payload = dict((key, value) for key, value in args.items() if value
                         is not None)
          payload.pop('self')
  
          params = self.base_params
  
          endpoint = self.base_endpoint.format('leads')
  
          return self._query_hunter(endpoint, params, 'post', payload)