I get a array return in get() in select laravel 5.6

when i run this

 $User_data = User::where('email', '=', $email)
            ->leftJoin('secutitequestion', function($join) {
                $join->on('users.id', '=', 'secutitequestion.user_id');
            })
            ->select('secutitequestion.securite_question1'
                ,'secutitequestion.securite_question2'
                ,'secutitequestion.securite_question3'
            ,'secutitequestion.user_id')
            ->get();

i get this result

{ "success": true, "token": null, "user": [ { "securite_question1": "what is your dream", "securite_question2": "other dream?", "securite_question3": "any other dream?", "user_id": 32 } ] }

but i want it like this

{ "success": true, "token": null, "user" { "securite_question1": "what is your dream", "securite_question2": "other dream?", "securite_question3": "any other dream?", "user_id": 32 } }

via Chebli Mohamed