fix placeholder users being resolved by authentication flows

database/migrations/2026_09_16_000001_remove_credentials_from_placeholder_users.php

@@ -0,0 +1,53 @@
+<?php
+
+declare(strict_types=1);
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Query\Builder;
+use Illuminate\Support\Facades\DB;
+
+return new class extends Migration
+{
+    /**
+     * Placeholder users used to be created as a full copy of the user they were made from,
+     * which included the credentials and the account state of that user. A placeholder is a
+     * stand-in for a person in one organization, not an account, and the row shares the email
+     * address with the real account, so these values are removed from the placeholders that
+     * already exist. The organization a placeholder belongs to is recorded on its member row.
+     */
+    public function up(): void
+    {
+        DB::table('users')
+            ->where('is_placeholder', '=', true)
+            ->where(function (Builder $builder): void {
+                $builder->whereNotNull('password')
+                    ->orWhereNotNull('remember_token')
+                    ->orWhereNotNull('two_factor_secret')
+                    ->orWhereNotNull('two_factor_recovery_codes')
+                    ->orWhereNotNull('two_factor_confirmed_at')
+                    ->orWhereNotNull('email_verified_at')
+                    ->orWhereNotNull('pending_email')
+                    ->orWhereNotNull('current_team_id')
+                    ->orWhereNotNull('profile_photo_path');
+            })
+            ->update([
+                'password' => null,
+                'remember_token' => null,
+                'two_factor_secret' => null,
+                'two_factor_recovery_codes' => null,
+                'two_factor_confirmed_at' => null,
+                'email_verified_at' => null,
+                'pending_email' => null,
+                'current_team_id' => null,
+                'profile_photo_path' => null,
+            ]);
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        //
+    }
+};