ant to use my group_vars variable with loops to assign variable value as argument which i want to run from playbook. for my workaround

I want to use my group_vars variable with loops to assign variable value as argument which i want to run from playbook. for my workaround

group_vars :


app.yml:

clay:
username_ice: admin
password_ice: abc1234

nTurn:
nTurn_AltStunPort: 3479
nTurn_PublicTurnPort: 3478
nTurn_PublicAltStunPort: 3479
nTurn_TurnAddress: “{{ansible_default_ipv4.address}}”
nTurn_PublicTurnAddress: “{{ansible_default_ipv4.address}}”
nTurn_PublicAltStunAddress: “{{ansible_default_ipv4.address}}”
nTurn_AltStunAddress: “{{ansible_default_ipv4.address}}”
nTurn_username: nicevoipuser
nTurn_password: ekzmapxj2016DMnice
nTurn_pkg_path: /clay-2.1.6-p13/nTurn-1.3.4.npkg

following is my playbook tasks: