prblm with adding the User to models

from django.db import models
from django.db.models import Model
from django.contrib.auth.models import User

class Rtr (models.Model):
ip = models.GenericIPAddressField(unpack_ipv4=True)
username = models.CharField(max_length=15)
password = models.CharField(max_length=15)
secret = models.CharField(max_length=15)
date = models.DateTimeField(auto_now_add=True)
manager = models.ForeignKey(User, default=None, on_delete=models.CASCADE)
def str(self):
return self.ip

after I completed my prjct, I want to add User to my db
when try to make migrations
django.db.utils.OperationalError: no such column: routers_rtr.manager_id

You’ve got an error somewhere else in your code.

Look for where you’ve using “routers_rtr” somewhere.