Expand the Jobs node, right click on Unassigned tasks and select New Task.
Create a Workflow Stored Procedure Task and give it a Name e.g. Update SDW User password
Select the Spatial Data WarehouseConnection, Click on the Astun radio button and select the Functionat_wkf_executecmd.
Enter the following in the Edit parameter 'cmdtoexecute' box, replacinguserandpasswordwith the name and password for the user whose password you wish to change.
ALTER USER "user" WITH PASSWORD 'password';
Click the Run button to run the task. You should see the dialog SPTask 'Update SDW User password' completed successfully. Click OK.