diff --git a/src/Client/ServiceAccount.php b/src/Client/ServiceAccount.php
index <HASH>..<HASH> 100644
--- a/src/Client/ServiceAccount.php
+++ b/src/Client/ServiceAccount.php
@@ -49,7 +49,7 @@ class ServiceAccount extends Client
      * @param int $id
      * @return \Unirest\Response
      */
-    public function get($id = 0)
+    public function get($id)
     {
         return parent::get($id);
     }
@@ -62,7 +62,7 @@ class ServiceAccount extends Client
      * @param string $username
      * @return \Unirest\Response
      */
-    public function getFromUsername($username = '')
+    public function getFromUsername($username)
     {
         $slug = implode('/', ['username', $username]);
         return $this->_get($slug);
@@ -76,7 +76,7 @@ class ServiceAccount extends Client
      * @param string $identifier
      * @return \Unirest\Response
      */
-    public function getFromIdentifier($identifier = '')
+    public function getFromIdentifier($identifier)
     {
         $slug = implode('/', ['identifier', $identifier]);
         return $this->_get($slug);
removed uneeded default values from ServiceAccount client