text: import datetime
  from django.db import models
  
  
  class User():
      pass
  
  
  class Task(models.Model):
      title = models.CharField(max_length=250, verbose_name="Titulo")
      conclusion_at = models.DateTimeField(blank=True, null=True)
      concluded = models.BooleanField(default=False, verbose_name="Concluído")
      create_at = models.DateTimeField(default=datetime.datetime.now)
      create_by = None
  
      def __str__(self) -> str:
          return str(self.title)