maybe?

alkatorapi/admin.py

@@ -2,8 +2,17 @@ from django.contrib import admin
 from django.http import HttpResponseRedirect
 from .models import User, Profile, Racer
 
-admin.register(Profile)
-admin.register(Racer)
+
+@admin.register(Racer)
+class AuthorAdmin(admin.ModelAdmin):
+    pass
+
+
+@admin.register(Profile)
+class AuthorAdmin(admin.ModelAdmin):
+    pass
+
+
 @admin.register(User)
 class UserAdmin(admin.ModelAdmin):
     change_form_template = "invoice_custom_admin_page.html"