email = models.EmailField(max_length=100, unique=True)
answers = models.CharField(max_length=65536, null=True, blank=True)
key_sent = models.BooleanField(default=False)
+ opened_link = models.BooleanField(default=False)
marks = JSONField(default={})
examiners = models.ManyToManyField(User, null=True, blank=True)
end_time = models.CharField(max_length=5, null=True, blank=True)