Add getScopesAttribute and getScopesAttribute methods (#1709)

* Add getScopesAttribute and setScopesAttribute methods

* Update Client.php

---------

Co-authored-by: Taylor Otwell <[email protected]>

Author: uintaam

Diff for: src/Client.php

@@ -115,6 +115,27 @@ public function getGrantTypesAttribute()
         return $this->attributes['grant_types'] ?? null;
     }
 
+    /**
+     * Get the scopes for the client.
+     *
+     * @return array|null
+     */
+    public function getScopesAttribute()
+    {
+        return $this->attributes['scopes'] ?? null;
+    }
+
+    /**
+     * Set the scopes for the client.
+     *
+     * @param  array|null  $scopes
+     * @return void
+     */
+    public function setScopesAttribute(?array $scopes)
+    {
+        $this->attributes['scopes'] = $scopes;
+    }
+
     /**
      * The temporary non-hashed client secret.
      *