There is not currently a credentials locker. We’ll consider this.
However, when you enter a username/password that needs to be applied to a group of hosts, you can apply that logon account’s credentials to numerous hosts in the grid at the same time by just selecting multiple rows in the grid before you click “OK” in the BP Credentials form. You don’t have to individually select a credential for each row. You can just do many rows at the same time, so long as all of the selected rows at any given time use the same credential.