While each Live365 Broadcaster account only comes with one username and login, it is still possible to have multiple DJs, without giving your login information to someone else.
When you sign up for your Live365 Broadcaster account, your station is issued credentials for going live (we call it 'Live DJ'). You can give other trusted DJs these credential such that they can take over the stream remotely using programs like Rocket Broadcaster, Mixxx, BUTT, PlayIt Live etc.
Please note: Once your remote DJ is finished with their session they must turn off the encoder (disconnect Mixxx, BUTT, etc) to allow any subsequent DJ to launch their show, or to allow your regular programming to resume. This means that the previous session must disconnect by the DJ prior to any another DJs launching their shows. Be careful to whom you give your Live DJ credentials. Find instructions on how to find your LiveDJ credentials here.