At the top right hand corner of your account, there is an icon for settings. In the settings area, there will be a tab called 'settings/preferences' and you will find your agency link here.
See image below:
Talent won't need an agency link to sign up, they can do so at talent.castingapp.com. Once they choose your agency as their representative, this will link talent to the agency.
Below will be where you can edit the Welcome Message that your talent will see when they click on the link:
This is what talent will see:
Video instructions below: