allow hashed_email to be empty

bam/models.py

@@ -5,7 +5,7 @@ from django.contrib.auth.hashers import make_password
 
 class Account(models.Model):
     user = models.OneToOneField(User, on_delete=models.CASCADE)
-    hashed_email = models.CharField(max_length=128)
+    hashed_email = models.CharField(max_length=128, blank=True)
 
     def __str__(self):
         return '%s' % (self.user.username)