TypeError: Cannot read properties of undefined (reading 'auth')

[rubixvi]

Describe the Bug

This is present in local builds and within the one-click deployment on Vercel.

collections/Users.ts

auth: true

  auth: {
    tokenExpiration: 28800,
    cookies: {
      sameSite: 'None',
      secure: true,
      domain: process.env.COOKIE_DOMAIN,
    },
    loginWithUsername: {
      allowEmailLogin: true,
      requireEmail: false,
    },
  },

TypeError: Cannot read properties of undefined (reading 'auth')

Link to the code that reproduces this issue

https://github.com/payloadcms/payload/blob/main/templates/with-vercel-website/src/collections/Users/index.ts

Reproduction Steps

This is present in local builds and within the one-click deployment on Vercel.

Which area(s) are affected? (Select all that apply)

area: core, area: templates

Environment Info

"payload": "^3.16.0"
"next": "15.1.4"

[github-actions]

🚀 This is included in version v3.19.0

[github-actions]

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Please open a new issue if this issue persists with any additional detail.