text: import mongoengine
  
  from utils.database.domains import Domain
  
  
  class User(mongoengine.Document):
      user_id = mongoengine.LongField(required=True)
  
      domains = mongoengine.EmbeddedDocumentListField(Domain)
  
      meta = {
          'db_alias': 'core',
          'collection': 'users'
      }
  