fixed resource path

Author: spelluru

articles/event-grid/security-authentication.md

@@ -164,7 +164,7 @@ aeg-sas-key: VXbGWce53249Mt8wuotr0GPmyJ/nDT4hgdEj9DpBeRr38arnnm5OFg==
 
 SAS tokens for Event Grid include the resource, an expiration time, and a signature. The format of the SAS token is: `r={resource}&e={expiration}&s={signature}`.
 
-The resource is the path for the event grid topic to which you're sending events. For example, a valid resource path is: `https://<yourtopic>.<region>.eventgrid.azure.net/eventGrid/api/events`
+The resource is the path for the event grid topic to which you're sending events. For example, a valid resource path is: `https://<yourtopic>.<region>.eventgrid.azure.net/eventGrid/api/events?api-version=2019-06-01`. To see all the supported API versions, see [Microsoft.EventGrid resource types](https://docs.microsoft.com/azure/templates/microsoft.eventgrid/allversions). 
 
 You generate the signature from a key.