Finished implementing AuthService (Unit/Integration tests, documentation and code)

src/vitest.setup.unit.ts

@@ -0,0 +1,6 @@
+import {beforeAll, afterEach, afterAll, vi} from 'vitest';
+import {mockServer} from "./mocks/node";
+
+beforeAll(() => mockServer.listen({onUnhandledRequest: 'error'}));
+afterEach(() => mockServer.resetHandlers());
+afterAll(() => mockServer.close());