fix: Search Indexing on User Model (#2213)

* style: Add helpful comments
* feat: Add search index getter for User model

Author: gmeben

backend/app/Models/User.php

@@ -149,6 +149,16 @@ public function toSearchableArray()
         ];
     }
 
+    /**
+     * Get the name of the index associated with the model.
+     *
+     * @return string
+     */
+    public function searchableAs(): string
+    {
+        return 'users_index';
+    }
+
     /**
      * Submissions that belong to the user
      *

backend/tests/Api/UserQueryTest.php

@@ -129,7 +129,7 @@ public static function searchUserTermsProvider(): array
             [
                 'searchTerm' => null,
                 'shouldFind' => null,
-                'count' => 10,
+                'count' => 10, // Search returns 10 results by default
             ],
             [
                 'searchTerm' => '12345',
@@ -144,7 +144,7 @@ public static function searchUserTermsProvider(): array
             [
                 'searchTerm' => '',
                 'shouldFind' => null,
-                'count' => 10,
+                'count' => 10, // Search returns 10 results by default
             ],
         ];
     }