refactor(core): Use an IoC container to manage singleton classes [Part-2] (no-changelog) (#5690)

* use typedi for UserManagementMailer

* use typedi for SamlService

* fix typos

* use typedi for Queue

* use typedi for License

* convert some more code to use typedi

packages/cli/test/integration/shared/utils.ts

@@ -41,7 +41,7 @@ import type { User } from '@db/entities/User';
 import { getLogger } from '@/Logger';
 import { loadPublicApiVersions } from '@/PublicApi/';
 import { issueJWT } from '@/auth/jwt';
-import * as UserManagementMailer from '@/UserManagement/email/UserManagementMailer';
+import { UserManagementMailer } from '@/UserManagement/email/UserManagementMailer';
 import {
 	AUTHLESS_ENDPOINTS,
 	COMMUNITY_NODE_VERSION,
@@ -177,7 +177,7 @@ export async function initTestServer({
 	if (functionEndpoints.length) {
 		const externalHooks = Container.get(ExternalHooks);
 		const internalHooks = Container.get(InternalHooks);
-		const mailer = UserManagementMailer.getInstance();
+		const mailer = Container.get(UserManagementMailer);
 		const repositories = Db.collections;
 
 		for (const group of functionEndpoints) {
@@ -226,6 +226,7 @@ export async function initTestServer({
 							logger,
 							externalHooks,
 							internalHooks,
+							mailer,
 							repositories,
 						}),
 					);