kubectl get nodes using context from a playbook

[user user]

I'm trying to fetch nodes list via ansible playbook using a context name. but its not working

my playbook:

cat getnodes.yaml

---

   - name: "get nodes"

     hosts: kubernetes

     tasks:

         - name: "nodes"

            command: "kubectl --context='contextname' get nodes"

I do have multiple clusters in the config file.. so I need to use context.

[user user]

Any help on this. 

I do have multiple clusters in config file. I need to either specify cluster name or context name and get the nodes list or to perform any activity  on a particular cluster