Using multiple machine credentials when running a job template in Tower

Hi,

When running a job template in Ansible-Tower I notice that I can only select one credential per job run. I have many machines in my inventory with different credentials and occasionally I would like to connect with passwords instead of private keys.

I can get this to work just perfectly in Ansible via the hosts file (ansible_user and ansible_ssh_pass) but not in Ansible-Tower.

How is this possible in one job? As far as I can see I can only select machine credentials for one single machine when editing a template. Or did I miss something? Thanks in advance!

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It looks like there is only paid support available, even though there is a Ansible Tower version that allows you to use it for a small amount of servers. Why not create a Tower group? Or has Red Hat requested not to do this?