Get data value from an sub array using Laravel

Good morning! I have a bug, thanks for your help in advance.

I have array from Vuejs object form and I want to save the value of each specific key. Let's try to loop the object then pass the key, I have error

"Trying to get property 'user_name' of non-object", exception: "ErrorException",…}

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    $team = $request->team;
   foreach ($team as $data) {
        return response($key->user_name);
      }

via Chebli Mohamed