fix add/delete sliver using inline on slice page
diff --git a/plstackapi/core/api/auth.py b/plstackapi/core/api/auth.py
index 4054da6..412df00 100644
--- a/plstackapi/core/api/auth.py
+++ b/plstackapi/core/api/auth.py
@@ -1,8 +1,8 @@
 from plstackapi.openstack.client import OpenStackClient
 
-def auth_check(auth):
-    client = OpenStackClient(username=auth['Username'],
-                             password=auth['AuthString'],
-                             tenant=auth['LoginBase'])
+def auth_check(username, password, tenant):
+    client = OpenStackClient(username=username,
+                             password=password,
+                             tenant=tenant)
     client.authenticate()
     return client