How to use custom namespace name inside kubernetes awx

- name: Create a k8s namespace
  kubernetes.core.k8s:
    name: testing
    api_version: v1
    kind: Namespace
    state: present

- name: Create a Service object from an inline definition
  kubernetes.core.k8s:
    state: present
    definition:
      apiVersion: v1
      kind: Service
      metadata:
        name: web
        namespace: testing
        labels:
          app: galaxy
          service: web
      spec:
        selector:
          app: galaxy
          service: web
        ports:
        - protocol: TCP
          targetPort: 8000
          name: port-8000-tcp
          port: 8000

From the following code i want to use a custom namespace like {{ namespace }} with awx or ansible but i get the following code "namespaces \\"{{ namespace }}\\" not found", is it posible to do that?