STripe Paymen and PK payemtns and many othe rbacekd and froentened issues

backend/igny8_core/auth/serializers.py

@@ -406,11 +406,20 @@ class RegisterSerializer(serializers.Serializer):
             )
             
             # Generate unique slug for account
-            base_slug = account_name.lower().replace(' ', '-').replace('_', '-')[:50] or 'account'
-            slug = base_slug
+            # Clean the base slug: lowercase, replace spaces and underscores with hyphens
+            import re
+            import random
+            import string
+            base_slug = re.sub(r'[^a-z0-9-]', '', account_name.lower().replace(' ', '-').replace('_', '-'))[:40] or 'account'
+            
+            # Add random suffix to prevent collisions (especially during concurrent registrations)
+            random_suffix = ''.join(random.choices(string.ascii_lowercase + string.digits, k=6))
+            slug = f"{base_slug}-{random_suffix}"
+            
+            # Ensure uniqueness with fallback counter
             counter = 1
             while Account.objects.filter(slug=slug).exists():
-                slug = f"{base_slug}-{counter}"
+                slug = f"{base_slug}-{random_suffix}-{counter}"
                 counter += 1
             
             # Create account with status and credits seeded (0 for paid pending)