regarding adding data into database using faker library

So I was adding data into the user model that is create using faker library  but i am facing certain error

 my populatescript screenshot is inserted

 

here is my user model class

from django.db import models

# Create your models here.

class user(models.Model):

firstname=models.CharField(max_length=250,unique=False)

lastname=models.CharField(max_length=250,unique=False)

emailid=models.CharField(max_length=500,unique=True)

def __str__(self):

return self.emailid

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