fix: 🐛 Add missing mirage config urls for credentials (#1209)

addons/api/addon/generated/models/credential.js

@@ -47,13 +47,6 @@ export default class GeneratedCredentialModel extends BaseModel {
   version;
 
   // =attributes (username_password)
-  @attr('string', {
-    for: 'username_password',
-    isNestedAttribute: true,
-    description: 'The password hmac for credential.',
-  })
-  password_hmac;
-
   @attr('string', {
     for: 'username_password',
     isNestedAttribute: true,

addons/api/addon/serializers/credential.js

@@ -3,7 +3,7 @@ import { copy } from 'ember-copy';
 
 export default class CredentialSerializer extends ApplicationSerializer {
   serialize() {
-    let serialized = super.serialize(...arguments);
+    const serialized = super.serialize(...arguments);
     delete serialized['attributes']['password_hmac'];
     return serialized;
   }