Nexmo Messaging API

I am working on an sms feature by the Nexmo package. i however ran into a difficulty that i cant solve. I have the following code in my rooutes php

Route::get('/sms/send/{to}', function(\Nexmo\Client $nexmo, $to){

$message = $nexmo->message()->send([
    'to' => '0725959830',
    'from' => '0791179389',
    'text' => 'Sending SMS from Laravel. Woohoo!'
]);
Log::info('sent message: ' . $message['message-id']);

});

then with this i get an error "Target [Nexmo\Client\Credentials\CredentialsInterface] is not instantiable while building [Nexmo\Client]." Any ideas please

via Chebli Mohamed