fixed typo on config

config/stag.php

@@ -2,7 +2,7 @@
 
 return [
     'backendUrl' => env('BACKEND_URL','http://localhost:8080'),
-    'stagUrl' => env('AUTH_URL', 'https://scholar.securecpu.com'),
+    'authUrl' => env('AUTH_URL', 'https://scholar.securecpu.com'),
     'hcpPortalUrl' =>env('HCP_PORTAL_URL', 'https://scholar.securecpu.com'),
     'tokboxApiKey' =>env('TOKBOX_API_KEY', '46678902')
 ];