docs: def get_cert_types(self):
          """
          Collect the certificate types that are available to the customer.
  
          :return: A list of dictionaries of certificate types
          :rtype: list
          """
          result = self.client.service.getCustomerCertTypes(authData=self.auth)
  
          if result.statusCode == 0:
              return jsend.success({'cert_types': result.types})
          else:
              return self._create_error(result.statusCode)