The steps:

• Clear the cookies.
• Click the button to POST GraphQL request.
• Find that there is a cookie: jwt=I%20AM%20peterlitszo%40gmail.com.

I am sure that the cookie is setted by response:

const result = res(
   // It will set header with `Set-Cookie: jwt=I%20AM%20peterlitszo%40gmail.com`
  ctx.cookie('jwt', `I AM ${email}`),
  ctx.data({
    users: [],
  }),
);

But I cannot find Set-Cookie in Chrome debugger's Network tag.

I am no sure what happen, do Set-Cookie cannot be show in Devtool? I cannot find information about it with Google.

Not only Chrome, I cannot find it in Firefox. :(