Updated selfservice tests to prevent email duplication

ref #197

src/tests/selfservice/selfservice_get.spec.ts

@@ -1,3 +1,4 @@
+import { faker } from '@faker-js/faker';
 import axios from 'axios';
 import { config } from '../../config';
 const base = "http://localhost:" + config.internal_port
@@ -30,7 +31,7 @@ describe('register + get should return 200', () => {
             "firstname": "string",
             "middlename": "string",
             "lastname": "string",
-            "email": "user@example.com"
+            "email": faker.internet.exampleEmail(),
         }, axios_config);
         expect(res.status).toEqual(200);
         expect(res.headers['content-type']).toContain("application/json");