bookstack/app/Access/ExternalBaseUserProvider.php

<?php

namespace BookStack\Access;

use BookStack\Users\Models\User;
use Illuminate\Contracts\Auth\Authenticatable;
use Illuminate\Contracts\Auth\UserProvider;

class ExternalBaseUserProvider implements UserProvider
{
    /**
     * Retrieve a user by their unique identifier.
     */
    public function retrieveById(mixed $identifier): ?Authenticatable
    {
        return User::query()->find($identifier);
    }

    /**
     * Retrieve a user by their unique identifier and "remember me" token.
     *
     * @param string $token
     */
    public function retrieveByToken(mixed $identifier, $token): null
    {
        return null;
    }

    /**
     * Update the "remember me" token for the given user in storage.
     *
     * @param Authenticatable $user
     * @param string          $token
     *
     * @return void
     */
    public function updateRememberToken(Authenticatable $user, $token)
    {
        //
    }

    /**
     * Retrieve a user by the given credentials.
     */
    public function retrieveByCredentials(array $credentials): ?Authenticatable
    {
        return User::query()
            ->where('external_auth_id', $credentials['external_auth_id'])
            ->first();
    }

    /**
     * Validate a user against the given credentials.
     */
    public function validateCredentials(Authenticatable $user, array $credentials): bool
    {
        // Should be done in the guard.
        return false;
    }

    public function rehashPasswordIfRequired(Authenticatable $user, #[\SensitiveParameter] array $credentials, bool $force = false)
    {
        // No action to perform, any passwords are external in the auth system
    }
}