diff --git a/bluem.php b/bluem.php
index f6f1690..6dcfed8 100644
--- a/bluem.php
+++ b/bluem.php
@@ -50,6 +50,7 @@
 use Bluem\BluemPHP\Bluem;
 use Bluem\Wordpress\Observability\BluemActivationNotifier;
 use Bluem\Wordpress\Observability\BluemSentry;
+use Bluem\Wordpress\Users\BluemUserIndexer;
 use Bluem\Wordpress\Presentation\BluemRequestGrouper;
 use Bluem\Wordpress\Requests\BluemEnabledRequestTypeFilter;
 use Bluem\Wordpress\Support\BluemComposerDependencyVersion;
@@ -1127,15 +1128,7 @@ function bluem_requests_view_with_filter( $filters = [], string $current_categor
  * @return void
  */
 function bluem_get_users_by_id(): array {
-    $users_by_id = [];
-
-    $users = get_users();
-
-    foreach ( $users as $user ) {
-        $users_by_id[ $user->ID ] = $user;
-    }
-
-    return $users_by_id;
+    return (new BluemUserIndexer())->index(get_users());
 }
 
 function bluem_get_requests_per_type( $filters = [] ): array {
diff --git a/src/Users/BluemUserIndexer.php b/src/Users/BluemUserIndexer.php
new file mode 100644
index 0000000..2a72993
--- /dev/null
+++ b/src/Users/BluemUserIndexer.php
@@ -0,0 +1,21 @@
+<?php
+
+namespace Bluem\Wordpress\Users;
+
+final class BluemUserIndexer
+{
+    /**
+     * @param array<int, object> $users
+     * @return array<int|string, object>
+     */
+    public function index(array $users): array
+    {
+        $usersById = [];
+
+        foreach ($users as $user) {
+            $usersById[$user->ID] = $user;
+        }
+
+        return $usersById;
+    }
+}
diff --git a/tests/Unit/BluemUserIndexerTest.php b/tests/Unit/BluemUserIndexerTest.php
new file mode 100644
index 0000000..af663cf
--- /dev/null
+++ b/tests/Unit/BluemUserIndexerTest.php
@@ -0,0 +1,20 @@
+<?php
+
+namespace Unit;
+
+use Bluem\Wordpress\Users\BluemUserIndexer;
+use PHPUnit\Framework\TestCase;
+
+final class BluemUserIndexerTest extends TestCase
+{
+    public function testItIndexesUsersByTheirWordPressId(): void
+    {
+        $first = (object) ['ID' => 12, 'user_login' => 'first'];
+        $second = (object) ['ID' => 34, 'user_login' => 'second'];
+
+        self::assertSame([
+            12 => $first,
+            34 => $second,
+        ], (new BluemUserIndexer())->index([$first, $second]));
+    }
+}