Add search param for list subscribers endpoint

app/config/collections.php

@@ -1810,6 +1810,17 @@ $commonCollections = [
                 'array' => false,
                 'filters' => [],
             ],
+            [
+                '$id' => ID::custom('search'),
+                'type' => Database::VAR_STRING,
+                'format' => '',
+                'size' => 16384,
+                'signed' => true,
+                'required' => false,
+                'default' => null,
+                'array' => false,
+                'filters' => [],
+            ],
         ],
         'indexes' => [
             [
@@ -1853,7 +1864,14 @@ $commonCollections = [
                 'attributes' => ['topicInternalId'],
                 'lengths' => [],
                 'orders' => [],
-            ]
+            ],
+            [
+                '$id' => ID::custom('_fulltext_search'),
+                'type' => Database::INDEX_FULLTEXT,
+                'attributes' => ['search'],
+                'lengths' => [],
+                'orders' => [],
+            ],
         ],
     ],
 

app/controllers/api/messaging.php

@@ -1955,6 +1955,7 @@ App::post('/v1/messaging/topics/:topicId/subscribers')
             'userId' => $user->getId(),
             'userInternalId' => $user->getInternalId(),
             'providerType' => $target->getAttribute('providerType'),
+            'search' => "{$target->getAttribute('providerType')} "
         ]);
 
         try {