valid renderings: 6/10 (60%)  gate: >= 0%

  FAIL POST   /books
  FAIL GET    /loans
  ok  POST   /auth/register
  ok  GET    /books
  ok  GET    /me/loans
  ok  POST   /auth/login
  ok  GET    /students
  FAIL POST   /loans/return
  ok  GET    /students/{studentId}
  FAIL POST   /loans/checkout
