Below are the steps to create a user in MDM Hub and assign ORS to user:
Step 1: Launch the jnlp file.
Step 2: Enter you credential, select the ORS.
Step 3: Under Workbench, select Users.
Step 4: Connect to Master Database.
Step 5: Acquire Lock, under User Tab, click on Add User.
Step 6: A window will pop, enter the information as per your need.
Step 7: Assign a default database(ORS) for the created user, click ok to create a user.
Step 8: (optional) To enable administrative privileges enable Administrator for that user.
Additional Note: Under Target Database tab you can assign user to ORS, just right click the ORS and select Assign User to DB.