Unless you already have an active BWS subscription, please first get yourself a BWS trial subscription at the BWS Portal, which will provide you with the necessary information for your BWS client. For this you need a BioID account with a confirmed email address.
With your BWS subscription you can create new BWS clients to receive the necessary information to call into the BWS:
The BWS Portal is also the place where you manage your subscription, clients and keys and where you can analyze your usage and inspect the bookeeping- and log-entries generated by your clients.