Fix Typo and Remove unused setting

Author: medeck

README.md

@@ -13,14 +13,14 @@ You will need to add the following lines to `config/app.php`
 ```php
 'providers' => [
     ...
-    Infernobass7\Laravel-PrintNode\PrintNodeServiceProvider::class,
+    Infernobass7\PrintNode\PrintNodeServiceProvider::class,
     ...
 ]
 ```
 
 Next you will want to publish the config file. 
 ```
-php artisan vendor:publish --provider="Infernobass7\Laravel-PrintNode\PrintNodeServiceProvider"
+php artisan vendor:publish --provider="Infernobass7\PrintNode\PrintNodeServiceProvider"
 ```
 
 #Configuration

src/Client.php

@@ -6,7 +6,6 @@
 
 class Client {
 	private $client;
-	private $authMethod = 'key';
 
 	private $username = null;
 	private $password = null;
@@ -45,8 +44,6 @@ class Client {
 
 	public function __construct() {
 		$this->client = new \GuzzleHttp\Client(['base_uri' => 'https://api.printnode.com']);
-
-		$this->authMethod = config('printnode.auth.method');
 	}
 
 	public function getAuthentication() {