Update how-to-authenticate-batch-endpoint.md

Author: santiagxf

articles/machine-learning/batch-inference/how-to-authenticate-batch-endpoint.md

@@ -145,7 +145,7 @@ In this case, we want to execute a batch endpoint using a service principal alre
 
 # [REST](#tab/rest)
 
-You can use the REST API of Azure Machine Learning to start a batch endpoints job using the user's credential. Follow these steps:
+1. Create a secret to use for authentication as explained at [Option 2: Create a new application secret](../../active-directory/develop/howto-create-service-principal-portal.md#option-2-create-a-new-application-secret). 
 
 1. Use the login service from Azure to get an authorization token. Authorization tokens are issued to a particular scope. The resource type for Azure Machine learning is `https://ml.azure.com`. The request would look as follows: