code: def _clean_required_args(self, url, redirect_uri, client_type):
          
          # Validate URLs
          for url_to_validate in (url, redirect_uri):
              try:
                  URLValidator()(url_to_validate)
              except ValidationError:
                  raise CommandError("URLs provided are invalid. Please provide valid application and redirect URLs.")
  
          # Validate and map client type to the appropriate django-oauth2-provider constant
          client_type = client_type.lower()
          client_type = {
              'confidential': CONFIDENTIAL,
              'public': PUBLIC
          }.get(client_type)
  
          if client_type is None:
              raise CommandError("Client type provided is invalid. Please use one of 'confidential' or 'public'.")
  
          self.fields = {  # pylint: disable=attribute-defined-outside-init
              'url': url,
              'redirect_uri': redirect_uri,
              'client_type': client_type,
          }
docs: Validate and clean the command's arguments.
  
          Arguments:
              url (str): Client's application URL.
              redirect_uri (str): Client application's OAuth2 callback URI.
              client_type (str): Client's type, indicating whether the Client application
                  is capable of maintaining the confidentiality of its credentials (e.g., running on a
                  secure server) or is incapable of doing so (e.g., running in a browser).
  
          Raises:
              CommandError, if the URLs provided are invalid, or if the client type provided is invalid.