Knife client create for several nodes


I am creating new clients for more than a 200 nodes.
I am looking for an option where I can do it without an editor being opened after knife client create and client.pems be saved in hostname.pem files which would eventually be copied to the respective hosts.

i do not see an option like "knife client from file … ".

With knife node create I was able to use one json and edit name in the json file to create multiple nodes, because it has an option "knife node from file… " but not so for knife client.