Fix authentication in README

README.md

@@ -58,14 +58,14 @@ https://enterprise.wikimedia.com/docs/#getting-started
     auth = r.json()
     ```
    
-4. Now you can use your access token (`auth["ACCESS_TOKEN"]`) to authenticate:
+4. Now you can use your access token (`auth["access_token"]`) to authenticate:
 
     ```python
     storage_options={
         "https": {
             "client_kwargs": {
                 "headers": {
-                    "Authorization": f"Bearer {auth['ACCESS_TOKEN']}"
+                    "Authorization": f"Bearer {auth['access_token']}"
                 }
             }
         }