code: def get_identities(self, item):
          
  
          item = item['data']
  
          for field in ["assignee", "reporter", "creator"]:
              if field not in item["fields"]:
                  continue
              if item["fields"][field]:
                  user = self.get_sh_identity(item["fields"][field])
                  yield user
  
          comments = item.get('comments_data', [])
          for comment in comments:
              if 'author' in comment and comment['author']:
                  user = self.get_sh_identity(comment['author'])
                  yield user
              if 'updateAuthor' in comment and comment['updateAuthor']:
                  user = self.get_sh_identity(comment['updateAuthor'])
                  yield user
docs: Return the identities from an item