how to get data from external api using array request

I need help... I need to extract data from external api in laravel but using a array of data for example: I have an array of users which is

{
"users":["jon", "doe"]
}

then I will call the external api url base on the array data requested and display response also base on the array requested.

//example 
//links _of_external_api?usernameusername={users:["jon", "doe"]}"
$response = "";
$data = collect($request['usernames']);
$url = Http::get("links _of_external_api?users=$data");
for ($i = 0; $i < count($data); $i++) {
		$response =  $response . $url;
         return response()->json($response);
 }