You will need to get at least a
basic access token to make requests in a production environment. To check your token status, login to the manager account, click on the gear icon on the top right corner, select
Account Settings from the drop-down menu, and click on
AdWords API Center on the left side panel. You can see your developer token as well as the access level associated with it. You can also apply for Basic access from this page.
Shwetha, AdWords API Team.