when null returned as user not found in db it go error insted of redirecting to error page or back to login

[MartinAbilev]

Provider type

Credentials

Environment

System:
    OS: Windows 10 10.0.19045
    CPU: (8) x64 Intel(R) Core(TM) i7-7700K CPU @ 4.20GHz
    Memory: 4.41 GB / 15.92 GB
  Binaries:
    Node: 21.7.3 - C:\Program Files\nodejs\node.EXE
    Yarn: 1.22.22 - C:\Program Files\nodejs\yarn.CMD
    npm: 10.5.0 - C:\Program Files\nodejs\npm.CMD
    pnpm: 9.10.0 - ~\AppData\Local\pnpm\pnpm.EXE
  Browsers:
    Edge: Chromium (127.0.2651.74)
    Internet Explorer: 11.0.19041.4355
  npmPackages:
    next: latest => 14.2.17
    next-auth: 5.0.0-beta.18 => 5.0.0-beta.18
    react: 18.3.0 => 18.3.0

Reproduction URL

https://github.com/MartinAbilev/biauth

Describe the issue

when entering wrong creditentials and null is returned instead of user we got

Unhandled Runtime Error
Error: Read more at https://errors.authjs.dev#credentialssignin

Call Stack
Module.callback
file:///E:/dv/biauth/.next/server/chunks/ssr/node_modules_@auth_core_d0bdea._.js (2958:30)

How to reproduce

just try to returning null in creditentials

Credentials({
  async authorize({ email, password }: any) {
     return null;

  },
}),

Expected behavior

i expect behavior where redirect hapens to errpage i specify in

pages: {
signIn: '/login',
error: '/error'
},

or back to login.