From https://docs.ansible.com/ansible/2.5/reference_appendices/tower.html
!!! note ""
Ansible Tower (formerly ‘AWX’) is a web-based solution that makes Ansible even more easy to use for IT teams of all kinds. It’s designed to be the hub for all of your automation tasks.
Tower allows you to control access to who can access what, even allowing sharing of SSH credentials without someone being able to transfer those credentials. Inventory can be graphically managed or synced with a wide variety of cloud sources. It logs all of your jobs, integrates well with LDAP, and has an amazing browsable REST API. Command line tools are available for easy integration with Jenkins as well. Provisioning callbacks provide great support for autoscaling topologies.
For the fields `SAML SERVICE PROVIDER PUBLIC CERTIFICATE` and `SAML SERVICE PROVIDER PRIVATE KEY`, you can either use custom certificates, or use the self-signed pair generated by passbook.
`x509cert` is the certificate configured in passbook. Remove the `--BEGIN CERTIFICATE--` and `--END CERTIFICATE--` headers, then enter the cert as one non-breaking string.