fix: Add type check for account username

addons/api/addon/models/account.js

@@ -13,12 +13,14 @@ export default class AccountModel extends GeneratedAccountModel {
   @fragment('fragment-account-attributes', { defaultValue: {} }) attributes;
 
   /**
-   * Convenience for getting login_name attribute.
+   * Convenience for getting username in account.
    * @type {string}
    */
-  @computed('attributes.login_name')
+  @computed('attributes')
   get username() {
-    return this.attributes.login_name;
+    if(this.type === 'password') {
+      return this.attributes.login_name;
+    }
   }
 
   // =methods

addons/api/tests/unit/models/account-test.js

@@ -10,7 +10,7 @@ module('Unit | Model | account', function (hooks) {
     assert.ok(model);
   });
 
-  test('it has an username attribute', function (assert) {
+  test('it has an username attribute for password account', function (assert) {
     assert.expect(2);
     const store = this.owner.lookup('service:store');
     let model = store.createRecord('account', {
@@ -21,4 +21,5 @@ module('Unit | Model | account', function (hooks) {
     model.attributes.login_name = 'username';
     assert.equal(model.username, 'username');
   });
+
 });