Setting up cookies option on development not working for subdomains.

[jonoise]

Hi, guys! The thing is that i've been developing a multi-tenant application with Next.js and in production, cookies works great! But when it comes to development I cant make them work properly. The next-auth.session-token is setting up on my main domain (localhost in dev) but not on my subdomain.localhost:3000

This are my cookies settings:

const useSecureCookies = !!process.env.VERCEL_URL
const host =
  process.env.NODE_ENV === 'production' ? '.mydomain.com' : 'localhost'

  cookies: {
    sessionToken: {
      name: `${useSecureCookies ? '__Secure-' : ''}next-auth.session-token`,
      options: {
        httpOnly: useSecureCookies,
        sameSite: 'lax',
        path: '/',
        domain: host,
        secure: useSecureCookies,
      },
    },
  },

I'm unable to access the session on mysubdomain.localhost:3000 on development, meaning I can properly develop features for logged in users on subdomains.

This are my nextjs and nextauth versions:

"next": "12.0.11-canary.8",
"next-auth": "^4.0.1",