curl --request POST \
  --url https://sandbox.hyperswitch.io/v2/payments/{payment_id}/create-external-sdk-tokens \
  --header 'Content-Type: application/json' \
  --header 'api-key: <api-key>' \
  --data '{}'

{
  "payment_id": "<string>",
  "session_token": [
    {
      "delayed_session_token": true,
      "connector": "<string>",
      "sdk_next_action": {
        "next_action": "post_session_tokens"
      },
      "wallet_name": "google_pay"
    }
  ],
  "vault_details": {
    "vgs": {
      "external_vault_id": "<string>",
      "sdk_env": "<string>"
    }
  }
}