the function I am using is add_using_ssh:

my ssh_key is a an Ssh type already

ssh_key = types.Ssh(public_key=my_ssh_key_string)

host = hosts_service.add_using_ssh(
                types.Host(
                    name=name,
                    description='',
                    address=address,
                    root_password=None,
                    port=22,
                    ssh=ssh_key,
                    cluster=types.Cluster(
                        name=cluster,
                    ),
                ),
            )

When I choose from GUI, it doesn't ask me to put in root password, so I set it as None (Not sure if this is correct)

I got error:

ovirtsdk4.Error: Fault reason is "Request syntactically incorrect.". Fault detail is "For correct usage, see: ovirt-engine/apidoc#services/hosts/methods/add". HTTP response code is 400.

looks like I didn't get all the parameters assigned?

Can anybody help with this?