Adobe's LiveCycle workbench connects directly to a LiveCycle server and the application is saved and deployed on the LiveCycle server itself.
You will have to enter the username and password associated with the server you are connecting to. You will also have to specify the hostname/IP address of the server to allow Workbench to connect and authenticate your credentials against the server. More details can be found in the Adobe help Documentation.
Hope this helps. Let me know if you have any other questions.
Thanks, Armaghan.