diff --git a/src/API/Authentication.php b/src/API/Authentication.php
index 7dcb65c7..64727abe 100644
--- a/src/API/Authentication.php
+++ b/src/API/Authentication.php
@@ -262,6 +262,10 @@ public function oauth_token($options = []) {
       $options['client_id'] = $this->client_id;
     }
 
+    if (! isset($options['client_secret'])) {
+      $options['client_secret'] = $this->client_secret;
+    }
+
     if (! isset($options['grant_type'])) {
       throw new ApiException('grant_type is mandatory');
     }
diff --git a/src/JWTVerifier.php b/src/JWTVerifier.php
index af1de095..e978d418 100644
--- a/src/JWTVerifier.php
+++ b/src/JWTVerifier.php
@@ -43,7 +43,7 @@ public function __construct($config) {
         }
 
         if (isset($config['suported_algs'])) {
-          throw new Exception("`suported_algs` was properly renamed to `supported_algs`.");
+          throw new CoreException("`suported_algs` was properly renamed to `supported_algs`.");
         }
 
         if (!isset($config['supported_algs'])) {
@@ -90,7 +90,6 @@ public function __construct($config) {
      */
     public function verifyAndDecode($jwt)
     {
-
         $tks = explode('.', $jwt);
         if (count($tks) != 3) {
             throw new InvalidTokenException('Wrong number of segments');