How can ctx.userClaims be nullable for auth: "user" ?

[Magnuti]

When using auth: 'user' shouldn't the fetch handler return 401 on no user/JWT? How can userClaims be nullable?

export default {
  fetch: withSupabase({ auth: 'user' }, async (_req, ctx) => {
        // Need to manually check if userClaims is actually present even though we use auth: 'user'
        if (!ctx.userClaims) { // userClaims is UserClaims | null
            return unauthorized("Missing userClaims for authenticated request")
        }
        const userId = ctx.userClaims.id
  }),
}

This would be ideal:

export default {
  fetch: withSupabase({ auth: 'user' }, async (_req, ctx) => {
        const userId = ctx.userClaims.id
  }),
}