fix: 🐛 OIDC authentications not properly showing username (#2930)

* fix: 🐛 properly show username for oidc auth method in user menu

* test: 💍 fix admin ui tests

* test: 💍 fix desktop ui tests

* refactor: 💡 admin to not store username in authenticated object

* refactor: 💡 use getter in app controller

* test: 💍 POC for how we could update our tests to use auth account

* refactor: 💡 remove unused service

* test: 💍 fix all tests in ui/admin

* test: 💍 revert one change

* refactor: 💡 update ui/desktop w/ feedback + fix tests

* refactor: 💡 add in error handling

* refactor: 💡 cleanup unused service

* test: 💍 fix e2e test selector

✅ Closes: https://hashicorp.atlassian.net/browse/ICU-17231

ui/admin/tests/acceptance/auth-methods/create-test.js

@@ -6,17 +6,14 @@
 import { module, test } from 'qunit';
 import { visit, currentURL, click, fillIn, select } from '@ember/test-helpers';
 import { setupApplicationTest } from 'admin/tests/helpers';
-import setupMirage from 'ember-cli-mirage/test-support/setup-mirage';
 import { setupSqlite } from 'api/test-support/helpers/sqlite';
 import { Response } from 'miragejs';
-import { authenticateSession } from 'ember-simple-auth/test-support';
 import * as commonSelectors from 'admin/tests/helpers/selectors';
 import * as selectors from './selectors';
 import { setRunOptions } from 'ember-a11y-testing/test-support';
 
 module('Acceptance | auth-methods | create', function (hooks) {
   setupApplicationTest(hooks);
-  setupMirage(hooks);
   setupSqlite(hooks);
 
   let getAuthMethodsCount;
@@ -24,7 +21,6 @@ module('Acceptance | auth-methods | create', function (hooks) {
 
   const instances = {
     scopes: {
-      global: null,
       org: null,
       project: null,
     },
@@ -41,7 +37,6 @@ module('Acceptance | auth-methods | create', function (hooks) {
   };
 
   hooks.beforeEach(async function () {
-    await authenticateSession({});
     instances.orgScope = this.server.create(
       'scope',
       {