Authentick will create a LDAP directory for the application. The third-party application can connect to it and get a list of all users.
LDAP directory requires requires no further configuration besides enabling it for a given application in the application settings.
In the application settings you will find the following details:
Hostname and port of the LDAP server
Base DN of the LDAP configuration
Bind User
Bind User Password
You will need to configure these details inside your application to connect against Authentick.