Fix: use 'records' field and correct username

domains/ducna.json

@@ -1,9 +1,9 @@
 {
   "owner": {
-    "username": "ducna",
+    "username": "NguyenAnhDuc",
     "email": "ducna01120@gmail.com"
   },
-  "record": {
+  "records": {
     "CNAME": "nguyenanhduc.github.io"
   }
 }