test(`should return 200 for ${numTestUsers} test users`, done => {
        const a = [];
        for (let i = 0; i < numTestUsers; ++i) {
            const password = `password${i}`;
            a.push(() => api.post("/user/register")
                .send({
                    username: `test${i}`,
                    password: password,
                    confirmPassword: password
                })
                .expect(200)
                .then(res => {
                    credentials.push({ user: res.body.id, password: password });
                }));
        }
        Promise.all(a).then(done);
    });