Fix user delete flow

tests/test_onboarding_flow.sh

@@ -463,7 +463,15 @@ echo "Registration Response:"
 echo "$REGISTER_RESPONSE" | python3 -m json.tool 2>/dev/null || echo "$REGISTER_RESPONSE"
 
 if check_response "$REGISTER_RESPONSE" "User Registration"; then
-    USER_ID=$(extract_json_field "$REGISTER_RESPONSE" "id")
+    USER_ID=$(echo "$REGISTER_RESPONSE" | python3 -c "
+import json, sys
+try:
+    data = json.load(sys.stdin)
+    user = data.get('user', {})
+    print(user.get('id', ''))
+except:
+    print('')
+")
     if [ -n "$USER_ID" ]; then
         log_success "User ID extracted: $USER_ID"
     fi
@@ -471,7 +479,6 @@ else
     echo "Full response: $REGISTER_RESPONSE"
     exit 1
 fi
-
 echo ""
 
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