feat: add brocker account list

test/app.e2e-spec.ts

@@ -102,4 +102,23 @@ describe('Authentication (e2e)', () => {
         expect(body).toEqual({ connected: false, connectedAt: null }),
       );
   });
+
+  it('guards brokerage accounts and reports a missing connection', async () => {
+    const registration = await request(app.getHttpServer())
+      .post('/api/v1/auth/register')
+      .send({ email: 'accounts@example.com', password: 'a secure password' })
+      .expect(201);
+    const accessToken = (registration.body as Authentication).accessToken;
+
+    await request(app.getHttpServer())
+      .get('/api/v1/brokerage-accounts')
+      .expect(401);
+    await request(app.getHttpServer())
+      .get('/api/v1/brokerage-accounts')
+      .set('Authorization', `Bearer ${accessToken}`)
+      .expect(409)
+      .expect(({ body }: { body: unknown }) =>
+        expect((body as Problem).code).toBe('TBANK_NOT_CONNECTED'),
+      );
+  });
 });