How to retrieve IPv4 of a running cluster using DigitalOcean API?

I manually created a Kubernetes cluster using DO. Once it is provisioned, I requested the retrieve cluster API to get the “ipv4” of the cluster.

GET REQUEST ENDPOINT- ‘https://api.digitalocean.com/v2/kubernetes/clusters/2dc1377e-b7cd-4748-a3ab-1172ea5e6529’

response:

{"kubernetes_cluster":{"id":"2dc1377e-b7cd-4748-a3ab-1172ea5e6529","name":"echo-cluster","region":"blr1","version":"1.25.4-do.0","cluster_subnet":"10.244.0.0/16","service_subnet":"10.245.0.0/16","vpc_uuid":"b8998521-1fe4-490c-9ca5-fefb8064bc08", 

"ipv4":"",

"endpoint":"https://2dc1377e-b7cd-4748-a3ab-1172ea5e6529.k8s.ondigitalocean.com","tags":["k8s","k8s:2dc1377e-b7cd-4748-a3ab-1172ea5e6529"],"node_pools":[{"id":"db947a30-8f4e-4e18-8689-cda755ede961","name":"echo-node","size":"s-2vcpu-4gb","count":2,"tags":["k8s","k8s:2dc1377e-b7cd-4748-a3ab-1172ea5e6529","k8s:worker"],"labels":null,"taints":[],"auto_scale":false,"min_nodes":0,"max_nodes":0,"nodes":[{"id":"93408395-e057-47f8-8f6a-71bb0fec6812","name":"echo-node-mkfos","status":{"state":"running"},"droplet_id":"334227005","created_at":"2023-01-04T09:33:46Z","updated_at":"2023-01-04T09:35:14Z"},{"id":"b483769e-6897-4095-a37f-12fe73379ddf","name":"echo-node-mkfo5","status":{"state":"running"},"droplet_id":"334227004","created_at":"2023-01-04T09:33:46Z","updated_at":"2023-01-04T09:35:14Z"}]}],"maintenance_policy":{"start_time":"5:00","duration":"4h0m0s","day":"any"},"auto_upgrade":false,"status":{"state":"running"},"created_at":"2023-01-04T09:33:46Z","updated_at":"2023-01-04T09:38:34Z","surge_upgrade":false,"registry_enabled":false,"ha":false,"supported_features":["cluster-autoscaler","docr-integration","ha-control-plane","token-authentication"]}}

As you can see in the response, i am not able to get the ipv4, how i will assign domain record to IP?