help with variable lookup

I’m a greenhorn…I have this problem where I want the user to input either dev or prod in an env prompt then I take that and access a dictionary to get its custom properties. it works fine if I hardcode {{ dev.ip }} but if I do a lookup it says variable dev.ip not found.
Also, let me know if there is a better way. Only gotcha is this if for networking so the target is always localhost and then it does api calls.

  • hosts: localhost
    gather_facts: no
    vars_prompt:
  • name: username
    prompt: “Username”
  • name: password
    prompt: “Password”
  • name: env
    prompt: “Environment”
    vars:
    prod:
    ip: ‘1.1.1.1’
    dev:
    ip: ‘10.130.155.53’
  • name: Query tenant customer-xyz
    aci_tenant:
    host: “{{ lookup(‘vars’, env + ‘.ip’) }}”
    #host: “{{ dev.ip }}”
    username: “{{ username }}”
    password: “{{password}}”
    state: present
    validate_certs: false
    register: my_tenant

fatal: [localhost]: FAILED! => {“msg”: “The task includes an option with an undefined variable.
The error was: No variable found with this name: dev.ip\n\nThe error appears to be in ‘/var/lib/awx/projects/aci-dev/querytenant.yml’:
line 19, column 5, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n
var: host\n - name: Query tenant customer-xyz\n ^ here\n”}