diff --git a/{{cookiecutter.project_slug}}/{{cookiecutter.project_slug}}/users/forms.py b/{{cookiecutter.project_slug}}/{{cookiecutter.project_slug}}/users/forms.py
index 7d3a296b..80cd97ae 100644
--- a/{{cookiecutter.project_slug}}/{{cookiecutter.project_slug}}/users/forms.py
+++ b/{{cookiecutter.project_slug}}/{{cookiecutter.project_slug}}/users/forms.py
@@ -1,6 +1,5 @@
 from django.contrib.auth import forms as admin_forms
 from django.contrib.auth import get_user_model
-from django.core.exceptions import ValidationError
 from django.utils.translation import gettext_lazy as _
 
 User = get_user_model()
@@ -12,20 +11,9 @@ class UserChangeForm(admin_forms.UserChangeForm):
 
 
 class UserCreationForm(admin_forms.UserCreationForm):
-
-    error_message = admin_forms.UserCreationForm.error_messages.update(
-        {"duplicate_username": _("This username has already been taken.")}
-    )
-
     class Meta(admin_forms.UserCreationForm.Meta):
         model = User
 
-    def clean_username(self):
-        username = self.cleaned_data["username"]
-
-        try:
-            User.objects.get(username=username)
-        except User.DoesNotExist:
-            return username
-
-        raise ValidationError(self.error_messages["duplicate_username"])
+        error_messages = {
+            "username": {"unique": _("This username has already been taken.")}
+        }