code: def get_soap_client(db_alias, client_class=None):
      
      if not beatbox:
          raise InterfaceError("To use SOAP API, you'll need to install the Beatbox package.")
      if client_class is None:
          client_class = beatbox.PythonClient
      soap_client = client_class()
  
      # authenticate
      connection = connections[db_alias]
      # verify the authenticated connection, because Beatbox can not refresh the token
      cursor = connection.cursor()
      cursor.urls_request()
      auth_info = connections[db_alias].sf_session.auth
  
      access_token = auth_info.get_auth()['access_token']
      assert access_token[15] == '!'
      org_id = access_token[:15]
      url = '/services/Soap/u/{version}/{org_id}'.format(version=salesforce.API_VERSION,
                                                         org_id=org_id)
      soap_client.useSession(access_token, auth_info.instance_url + url)
      return soap_client
docs: Create the SOAP client for the current user logged in the db_alias
  
      The default created client is "beatbox.PythonClient", but an
      alternative client is possible. (i.e. other subtype of beatbox.XMLClient)