Genesys Cloud Integration with Mulesoft (Web Service data intergration)

Hi Team,

I'm trying to create Web service data action integration for Mulesoft endpoint to fetch the customer information.

I tried different ways to build the different authentication method , basic auth & user defined oAuth but nothing seems to work. I tried using postman & its work without any issue.

Attaching the postman collection json below... could someone help me with right approach to build Genesys cloud data action & integration ?

{
	"info": {
		"_postman_id": "b8efdf78-7607-4a44-b933-4a9ecc11de00",
		"name": "DEV: Contacts-Genesys",
		"schema": "https://schema.getpostman.com/json/collection/v2.1.0/collection.json",
		"_exporter_id": "33285836"
	},
	"item": [
		{
			"name": "Generate token",
			"event": [
				{
					"listen": "test",
					"script": {
						"exec": [
							"var data = pm.response.json();\r",
							"pm.collectionVariables.set(\"access_token\", data.access_token);"
						],
						"type": "text/javascript",
						"packages": {}
					}
				}
			],
			"request": {
				"auth": {
					"type": "basic",
					"basic": [
						{
							"key": "password",
							"value": "xxxxxxxxxxxxxx",
							"type": "string"
						},
						{
							"key": "username",
							"value": "xxxxxxxxxxxxx",
							"type": "string"
						}
					]
				},
				"method": "POST",
				"header": [],
				"url": {
					"raw": "https://xxxxxxxxxxxxxxx",
					"protocol": "https",
					"host": [
						"dev-apint",
						"bat",
						"net"
					],
					"path": [
						"bat-p-c4ev2-oauth2-t",
						"v2",
						"oauth2",
						"token"
					],
					"query": [
						{
							"key": "grant_type",
							"value": "client_credentials"
						}
					]
				}
			},
			"response": []
		},
		{
			"name": "Contacts_by_phoneNumber",
			"request": {
				"auth": {
					"type": "bearer",
					"bearer": [
						{
							"key": "token",
							"value": "xxxxxxxxxxxxxxx",
							"type": "string"
						}
					]
				},
				"method": "GET",
				"header": [],
				"url": {
					"raw": "https:// xxxxxxxxxxxxxxxxxxxxxxxxxx",
					"protocol": "https",
					"host": [
						"dev-apint",
						"bat",
						"net"
					],
					"path": [
						"bat-e-md2b-sf-petra-d",
						"v1",
						"contacts"
					],
					"query": [
						{
							"key": "endMarketISO",
							"value": "DE"
						},
						{
							"key": "phoneNumber",
							"value": "xxxxxxxxx"
						},
						{
							"key": "",
							"value": "",
							"disabled": true
						}
					]
				}
			},
			"response": []
		}
	],
	"variable": [
		{
			"key": "access_token",
			"value": ""
		}
	]
}