diff --git a/src/accounts/utils.py b/src/accounts/utils.py
index 16a2c71..11d4cf4 100644
--- a/src/accounts/utils.py
+++ b/src/accounts/utils.py
@@ -3,15 +3,16 @@ from allauth.account.models import EmailAddress
 from .models import Address, User
 from .tasks import send_account_created_email
 
+
 def get_or_create_customer(request, form, shipping_address):
     address, a_created = Address.objects.get_or_create(
-        first_name = shipping_address['first_name'],
-        last_name = shipping_address['last_name'],
-        street_address_1 = shipping_address['street_address_1'],
-        street_address_2 = shipping_address['street_address_2'],
-        city = shipping_address['city'],
-        state = shipping_address['state'],
-        postal_code = shipping_address['postal_code']
+        first_name=shipping_address['first_name'],
+        last_name=shipping_address['last_name'],
+        street_address_1=shipping_address['street_address_1'],
+        street_address_2=shipping_address['street_address_2'],
+        city=shipping_address['city'],
+        state=shipping_address['state'],
+        postal_code=shipping_address['postal_code']
     )
 
     if request.user.is_authenticated:
@@ -23,8 +24,8 @@ def get_or_create_customer(request, form, shipping_address):
     else:
         user, u_created = User.objects.get_or_create(
             email=form.cleaned_data['email'],
-            defaults = {
-                'username': form.cleaned_data['email'],
+            defaults={
+                'username': form.cleaned_data['email'].lower(),
                 'is_staff': False,
                 'is_active': True,
                 'is_superuser': False,
@@ -39,7 +40,9 @@ def get_or_create_customer(request, form, shipping_address):
             user.addresses.add(address)
             user.save()
 
-            EmailAddress.objects.create(user=user, email=user.email, primary=True, verified=False)
+            EmailAddress.objects.create(
+                user=user, email=user.email, primary=True, verified=False
+            )
 
             u = {
                 'full_name': user.get_full_name(),