You access Workflow Manager (WFM) as an Ambari View. You create an instance of the WFM View from the Ambari web UI. You can create multiple instances of a View and you can assign different users to different Views.

Instructions for creating a WFM View are included in the Apache Ambari Views guide:

More Information

Configuring Ambari Views for Kerberos in the Apache Ambari Views guide

Managing Cluster Roles in the Apache Ambari Administration guide