From the client container, run eapol_test:
root@automatic-eap-client:~# eapol_test -c /tmp/automatic-eap/eapol_ttls-pap.conf -a $RADIUS_IP -s testing123
...
SUCCESS
root@automatic-eap-client:~#
For testing, the password is hard-coded in the eapol_ttls-pap.conf file.
In the real world, the EAP client would prompt the user for a password.