Authentik or OIDC like provider not recognize the same user.

Provider type

Authentik

Environment

  System:
    OS: macOS 14.1.1
    CPU: (8) arm64 Apple M1
    Memory: 237.05 MB / 16.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 21.6.2 - ~/.nvm/versions/node/v21.6.2/bin/node
    Yarn: 1.22.21 - ~/.nvm/versions/node/v21.6.2/bin/yarn
    npm: 10.2.4 - ~/.nvm/versions/node/v21.6.2/bin/npm
    pnpm: 8.15.4 - ~/.nvm/versions/node/v21.6.2/bin/pnpm
  Browsers:
    Chrome: 124.0.6367.92
    Safari: 17.1
  npmPackages:
    @auth/typeorm-adapter: ^2.0.0 => 2.0.0 
    next: 14.2.2 => 14.2.2 
    next-auth: ^5.0.0-beta.17 => 5.0.0-beta.17 
    react: ^18 => 18.2.0

Reproduction URL

not quite need i guess?

Describe the issue

Using authentik as the provider with the same user login each time will create a new user.

not quite familiar with OAuth or OIDC, just happened to develop an app using it >:)

Turns out the return profile object does not contain the id property that seems nextauth used to identify the user. And the solution is quite simple for me just editing the profile object like this

AuthentikProvider({
      clientId: config.auth.autho.id,
      clientSecret: config.auth.autho.secret,
      issuer: config.auth.autho.issuer,
      profile(profile) {
        return {
          ...profile,
          id: profile.sub,
        }
      }
    })

I could now see the providerAccountId in the database is equal to sub returning from authentik

I also dug into some other similar providers like keycloak and found out their provider config file is quite the same and probably not have considered this scenario.

So I am guessing is this a bug or a feature?

How to reproduce

use authentik as provider

Expected behavior

Using authentik as the provider with the same user login each time will create a new user and with the default setting it will not let me login because the same email address.

We could not detect a valid reproduction link. Make sure to follow the bug report template carefully.

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nextauthjs / next-auth