Please note that app1 is publicly available and app2 is protected by Authelia.
You can start by visiting app1 and then try to access app2. Since app2 is protected by Authelia, you will be redirected to Authelia's portal.
If it's the first time you login in this cluster, you'll need to choose your authentication method and follow Authelia's instructions.
Once done, you'll be able to authenticate with your selected second factor method.
Here is the list of available users in the LDAP
You can always log off by clicking here