[dba-VB] Trusted Connection versus What?

In the I Buy Spy sample apps, there is a connection string like this:

<add key="ConnectionString"
value="server=localhost;Trusted_Connection=true;database=Store" /> 

My db server is not set up for trusted connections. What do I change this
to? Do I embed a suitable uid and pswd right in the string or what?

TIA,
Arthur