parameters: (self, api, users)
docstring: Called upon an update from the API to a user's contacts.
  
          :param api: Reference to the API object.
          :param users: List that contains the new or updated contacts.
docstring_summary: Called upon an update from the API to a user's contacts.
docstring_tokens: Called upon an update from the API to a user s contacts .
function: def onUsersUpdate(self, api, users):
          """
          Called upon an update from the API to a user's contacts.
  
          :param api: Reference to the API object.
          :param users: List that contains the new or updated contacts.
          """
          if users != None:
              logging.info('Users updated ({})'.format(users.size()))
function_tokens: def onUsersUpdate ( self , api , users ) : if users != None : logging . info ( 'Users updated ({})' . format ( users . size ( ) ) )