fix: [credential] validate all

Author: DavidCruciani

objects/credential/definition.json

@@ -62,17 +62,17 @@
         "unknown"
       ]
     },
-    "username": {
-      "description": "Username related to the password(s)",
-      "misp-attribute": "text",
-      "ui-priority": 1
-    },
     "use-at": {
       "description": "The link identifying where the credential is used.",
       "disable_correlation": true,
-      "multiple": true,
       "misp-attribute": "link",
+      "multiple": true,
       "ui-priority": 0
+    },
+    "username": {
+      "description": "Username related to the password(s)",
+      "misp-attribute": "text",
+      "ui-priority": 1
     }
   },
   "description": "Credential describes one or more credential(s) including password(s), api key(s) or decryption key(s).",