Added delete triggers to foreign keys

main/models.py

@@ -4,4 +4,4 @@ from django.contrib.auth.models import User
 
 class ResetToken(models.Model):
     token = models.CharField(max_length=8)
-    user = models.ForeignKey(User)
+    user = models.ForeignKey(User, on_delete=models.DO_NOTHING)