Instead of ‘login’ and ‘password’ use your credentials from https://app.dataforseo.com/api-access

# Instead of 'login' and 'password' use your credentials from https://app.dataforseo.com/api-access \
login="login" 
password="password" 
cred="$(printf ${login}:${password} | base64)" 
id="02261816-2027-0066-0000-c27d02864073" 
curl --location --request GET "https://api.dataforseo.com/v3/serp/google/maps/task_get/advanced/${id}" \
--header "Authorization: Basic ${cred}"  \
--header "Content-Type: application/json" \
--data-raw ''

<?php
// You can download this file from here https://cdn.dataforseo.com/v3/examples/php/php_RestClient.zip
require('RestClient.php');
$api_url = 'https://api.dataforseo.com/';
try {
	// Instead of 'login' and 'password' use your credentials from https://app.dataforseo.com/api-access
	$client = new RestClient($api_url, null, 'login', 'password');
} catch (RestClientException $e) {
	echo "\n";
	print "HTTP code: {$e->getHttpCode()}\n";
	print "Error code: {$e->getCode()}\n";
	print "Message: {$e->getMessage()}\n";
	print  $e->getTraceAsString();
	echo "\n";
	exit();
}
try {
	$result = array();
	// #1 - using this method you can get a list of completed tasks
	// GET /v3/serp/google/maps/tasks_ready
	// in addition to 'google' and 'maps' you can also set other search engine and type parameters
	// the full list of possible parameters is available in documentation
	$tasks_ready = $client->get('/v3/serp/google/maps/tasks_ready');
	// you can find the full list of the response codes here https://docs.dataforseo.com/v3/appendix/errors
	if (isset($tasks_ready['status_code']) AND $tasks_ready['status_code'] === 20000) {
		foreach ($tasks_ready['tasks'] as $task) {
			if (isset($task['result'])) {
				foreach ($task['result'] as $task_ready) {
					// #2 - using this method you can get results of each completed task
					// GET /v3/serp/google/maps/task_get/advanced/$id
					if (isset($task_ready['endpoint_advanced'])) {
						$result[] = $client->get($task_ready['endpoint_advanced']);
					}
					// #3 - another way to get the task results by id
					// GET /v3/serp/google/maps/task_get/advanced/$id
					/*
					if (isset($task_ready['id'])) {
						$result[] = $client->get('/v3/serp/google/maps/task_get/advanced/' . $task_ready['id']);
					}
					*/
				}
			}
		}
	}
	print_r($result);
	// do something with result
} catch (RestClientException $e) {
	echo "\n";
	print "HTTP code: {$e->getHttpCode()}\n";
	print "Error code: {$e->getCode()}\n";
	print "Message: {$e->getMessage()}\n";
	print  $e->getTraceAsString();
	echo "\n";
}
$client = null;
?>

from client import RestClient
# You can download this file from here https://cdn.dataforseo.com/v3/examples/python/python_Client.zip
client = RestClient("login", "password")
# 1 - using this method you can get a list of completed tasks
# GET /v3/serp/google/maps/tasks_ready
# in addition to 'google' and 'maps' you can also set other search engine and type parameters
# the full list of possible parameters is available in documentation
response = client.get("/v3/serp/google/maps/tasks_ready")
# you can find the full list of the response codes here https://docs.dataforseo.com/v3/appendix/errors
if response["status_code"] == 20000:
    results = []
    for task in response['tasks']:
        if (task['result'] and (len(task['result']) > 0)):
            for resultTaskInfo in task['result']:
                # 2 - using this method you can get results of each completed task
                # GET /v3/serp/google/maps/task_get/advanced/$id
                if(resultTaskInfo['endpoint_advanced']):
                    results.append(client.get(resultTaskInfo['endpoint_advanced']))
                '''
                # 3 - another way to get the task results by id
                # GET /v3/serp/google/maps/task_get/advanced/$id                
                if(resultTaskInfo['id']):
                    results.append(client.get("/v3/serp/google/maps/task_get/advanced/" + resultTaskInfo['id']))
                '''
    print(results)
    # do something with result
else:
    print("error. Code: %d Message: %s" % (response["status_code"], response["status_message"])) 

const task_id = '02231256-2604-0066-2000-57133b8fc54e';

const axios = require('axios');

axios({
    method: 'get',
    url: 'https://api.dataforseo.com/v3/serp/google/maps/task_get/advanced/' + task_id,
    auth: {
        username: 'login',
        password: 'password'
    },
    headers: {
        'content-type': 'application/json'
    }
}).then(function (response) {
    var result = response['data']['tasks'];
    // Result data
    console.log(result);
}).catch(function (error) {
    console.log(error);
});

using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Text;
using System.Threading.Tasks;

namespace DataForSeoDemos
{
    public static partial class Demos
    {
        public static async Task serp_task_get()
        {
            var httpClient = new HttpClient
            {
                BaseAddress = new Uri("https://api.dataforseo.com/"),
                // Instead of 'login' and 'password' use your credentials from https://app.dataforseo.com/api-access
                DefaultRequestHeaders = { Authorization = new AuthenticationHeaderValue("Basic", Convert.ToBase64String(Encoding.ASCII.GetBytes("login:password"))) }
            };
            // #1 - using this method you can get a list of completed tasks
            // GET /v3/serp/google/maps/tasks_ready
            // in addition to 'google' and 'maps' you can also set other search engine and type parameters
            // the full list of possible parameters is available in documentation
            var response = await httpClient.GetAsync("/v3/serp/google/maps/tasks_ready");
            var tasksInfo = JsonConvert.DeserializeObject<dynamic>(await response.Content.ReadAsStringAsync());
            var tasksResponses = new List<object>();
            // you can find the full list of the response codes here https://docs.dataforseo.com/v3/appendix/errors
            if (tasksInfo.status_code == 20000)
            {
                foreach (var tasks in tasksInfo.tasks)
                {
                    if (tasks.First.result != null)
                    {
                        foreach (var task in tasks.First.result)
                        {
                            if (task.endpoint_advanced != null)
                            {
                                // #2 - using this method you can get results of each completed task
                                // GET /v3/serp/google/maps/task_get/advanced/$id
                                var tasksGetResponse = await httpClient.GetAsync((string)task.endpoint_advanced);
                                var tasksResultObj = JsonConvert.DeserializeObject<dynamic>(await tasksGetResponse.Content.ReadAsStringAsync());
                                if (tasksResultObj.tasks != null)
                                {
                                    foreach (var taskResult in tasksResultObj.tasks)
                                    {
                                        var fst = taskResult.First;
                                        // you can find the full list of the response codes here https://docs.dataforseo.com/v3/appendix/errors
                                        if (fst.status_code >= 40000 || fst.result == null)
                                            Console.WriteLine($"error. Code: {fst.status_code} Message: {fst.status_message}");
                                        else
                                            tasksResponses.Add(fst.result);
                                    }
                                }

                                // #3 - another way to get the task results by id
                                // GET /v3/serp/google/maps/task_get/advanced/$id
                                /*
                                var tasksGetResponse = await httpClient.GetAsync("/v3/serp/google/maps/task_get/advanced/" + (string)task.id);
                                var tasksResultObj = JsonConvert.DeserializeObject<dynamic>(await tasksGetResponse.Content.ReadAsStringAsync());
                                if (tasksResultObj.tasks != null)
                                {
                                    foreach (var taskResult in tasksResultObj.tasks)
                                    {
                                        var fst = taskResult.First;
                                        // you can find the full list of the response codes here https://docs.dataforseo.com/v3/appendix/errors
                                        if (fst.status_code >= 40000 || fst.result == null)
                                            Console.WriteLine($"error. Code: {fst.status_code} Message: {fst.status_message}");
                                        else
                                            tasksResponses.Add(fst.result);
                                    }
                                }
                                */
                            }
                        }
                    }
                }
                if (tasksResponses.Count > 0)
                    // do something with result
                    Console.WriteLine(String.Join(Environment.NewLine, tasksResponses));
                else
                    Console.WriteLine("No completed tasks");
            }
            else
                Console.WriteLine($"error. Code: {tasksInfo.status_code} Message: {tasksInfo.status_message}");
        }
    }
}

The above command returns JSON structured like this:

{
  "version": "0.1.20230705",
  "status_code": 20000,
  "status_message": "Ok.",
  "time": "0.0493 sec.",
  "cost": 0,
  "tasks_count": 1,
  "tasks_error": 0,
  "tasks": [
    {
      "id": "08021543-1535-0066-0000-bcbd9fbff47a",
      "status_code": 20000,
      "status_message": "Ok.",
      "time": "0.0156 sec.",
      "cost": 0,
      "result_count": 1,
      "path": [
        "v3",
        "serp",
        "google",
        "maps",
        "task_get",
        "advanced",
        "08021543-1535-0066-0000-bcbd9fbff47a"
      ],
      "data": {
        "api": "serp",
        "function": "task_get",
        "se": "google",
        "se_type": "maps",
        "language_code": "en",
        "keyword": "albert einstein",
        "location_code": 2840,
        "depth": 3,
        "device": "desktop",
        "os": "windows"
      },
      "result": [
        {
          "keyword": "albert einstein",
          "type": "maps",
          "se_domain": "google.com",
          "location_code": 2840,
          "language_code": "en",
          "check_url": "https://google.com/maps/search/albert+einstein/@37.09024,-95.712891,4z?hl=en&gl=US&uule=w+CAIQIFISCQs2MuSEtepUEUK33kOSuTsc",
          "datetime": "2023-08-02 12:43:05 +00:00",
          "spell": null,
          "refinement_chips": null,
          "item_types": [
            "maps_search"
          ],
          "se_results_count": 0,
          "items_count": 3,
          "items": [
            {
              "type": "maps_search",
              "rank_group": 1,
              "rank_absolute": 1,
              "domain": null,
              "title": "Albert Einstein Statue",
              "original_title": null,
              "url": null,
              "contact_url": null,
              "contributor_url": null,
              "book_online_url": null,
              "rating": null,
              "rating_distribution": null,
              "snippet": "6700 NW 35th St, Bethany, OK 73008",
              "address": "6700 NW 35th St, Bethany, OK 73008",
              "address_info": {
                "borough": "Central Oklahoma City",
                "address": "6700 NW 35th St",
                "city": "Bethany",
                "zip": "73008",
                "region": "Oklahoma",
                "country_code": "US"
              },
              "place_id": "ChIJSe0feYkFsocRajueupcvpas",
              "phone": null,
              "main_image": "https://lh5.googleusercontent.com/p/AF1QipOfM59_liNdL9hmEDbU0_K1uTSv4psbY7rY2bAj=w408-h541-k-no",
              "total_photos": 12,
              "category": "Tourist attraction",
              "additional_categories": null,
              "category_ids": [
                "tourist_attraction"
              ],
              "work_hours": {
                "timetable": null,
                "current_status": "close"
              },
              "feature_id": "0x87b20589791fed49:0xaba52f97ba9e3b6a",
              "cid": "12368344280360434538",
              "latitude": 35.5064351,
              "longitude": -97.6317255,
              "is_claimed": false,
              "local_justifications": null,
              "is_directory_item": false,
              "price_level": null,
              "hotel_rating": null
            },
            {
              "type": "maps_search",
              "rank_group": 2,
              "rank_absolute": 2,
              "domain": "www.alberteinsteingroup.com",
              "title": "The Albert Einstein Group, Inc.",
              "original_title": null,
              "url": "http://www.alberteinsteingroup.com/",
              "contact_url": null,
              "contributor_url": null,
              "book_online_url": null,
              "rating": {
                "rating_type": "Max5",
                "value": 4,
                "votes_count": 4,
                "rating_max": null
              },
              "rating_distribution": {
                "1": 1,
                "2": 0,
                "3": 0,
                "4": 0,
                "5": 3
              },
              "snippet": "8710 Converse Business Cir, Converse, TX 78109",
              "address": "8710 Converse Business Cir, Converse, TX 78109",
              "address_info": {
                "borough": "Northeast Side",
                "address": "8710 Converse Business Cir",
                "city": "Converse",
                "zip": "78109",
                "region": "Texas",
                "country_code": "US"
              },
              "place_id": "ChIJ5QKOJR6KXIYRm3-tvYC0RuE",
              "phone": "+1833-463-3325",
              "main_image": "https://lh5.googleusercontent.com/p/AF1QipMwYCFGMituQ_CohAgfNF6pQPNjt-b-FR96b7xc=w416-h240-k-no",
              "total_photos": 18,
              "category": "Business to business service",
              "additional_categories": null,
              "category_ids": [
                "business_to_business_service"
              ],
              "work_hours": {
                "timetable": {
                  "sunday": null,
                  "monday": [
                    {
                      "open": {
                        "hour": 8,
                        "minute": 0
                      },
                      "close": {
                        "hour": 17,
                        "minute": 0
                      }
                    }
                  ],
                  "tuesday": [
                    {
                      "open": {
                        "hour": 8,
                        "minute": 0
                      },
                      "close": {
                        "hour": 17,
                        "minute": 0
                      }
                    }
                  ],
                  "wednesday": [
                    {
                      "open": {
                        "hour": 8,
                        "minute": 0
                      },
                      "close": {
                        "hour": 17,
                        "minute": 0
                      }
                    }
                  ],
                  "thursday": [
                    {
                      "open": {
                        "hour": 8,
                        "minute": 0
                      },
                      "close": {
                        "hour": 17,
                        "minute": 0
                      }
                    }
                  ],
                  "friday": [
                    {
                      "open": {
                        "hour": 8,
                        "minute": 0
                      },
                      "close": {
                        "hour": 17,
                        "minute": 0
                      }
                    }
                  ],
                  "saturday": [
                    {
                      "open": {
                        "hour": 8,
                        "minute": 0
                      },
                      "close": {
                        "hour": 12,
                        "minute": 0
                      }
                    }
                  ]
                },
                "current_status": "close"
              },
              "feature_id": "0x865c8a1e258e02e5:0xe146b480bdad7f9b",
              "cid": "16232860371934609307",
              "latitude": 29.515755199999997,
              "longitude": -98.3017169,
              "is_claimed": true,
              "local_justifications": null,
              "is_directory_item": false,
              "price_level": null,
              "hotel_rating": null
            },
            {
              "type": "maps_search",
              "rank_group": 3,
              "rank_absolute": 3,
              "domain": null,
              "title": "Albert Einstein Statue",
              "original_title": null,
              "url": null,
              "contact_url": null,
              "contributor_url": null,
              "book_online_url": null,
              "rating": {
                "rating_type": "Max5",
                "value": 4.7,
                "votes_count": 14,
                "rating_max": null
              },
              "rating_distribution": {
                "1": 0,
                "2": 0,
                "3": 1,
                "4": 2,
                "5": 11
              },
              "snippet": "172 Gore Creek Dr, Vail, CO 81657",
              "address": "172 Gore Creek Dr, Vail, CO 81657",
              "address_info": {
                "borough": null,
                "address": "172 Gore Creek Dr",
                "city": "Vail",
                "zip": "81657",
                "region": "Colorado",
                "country_code": "US"
              },
              "place_id": "ChIJy2EyO2xwaocRcwmC0WGy9jM",
              "phone": null,
              "main_image": "https://lh5.googleusercontent.com/p/AF1QipPzOIua4GVc8oLCTCNT6nkDZr369gpxVFPnkcOC=w408-h306-k-no",
              "total_photos": 10,
              "category": "Sculpture",
              "additional_categories": [
                "Tourist attraction"
              ],
              "category_ids": [
                "sculpture",
                "tourist_attraction"
              ],
              "work_hours": {
                "timetable": {
                  "sunday": [
                    {
                      "open": {
                        "hour": 0,
                        "minute": 0
                      },
                      "close": {
                        "hour": 0,
                        "minute": 0
                      }
                    }
                  ],
                  "monday": [
                    {
                      "open": {
                        "hour": 0,
                        "minute": 0
                      },
                      "close": {
                        "hour": 0,
                        "minute": 0
                      }
                    }
                  ],
                  "tuesday": [
                    {
                      "open": {
                        "hour": 0,
                        "minute": 0
                      },
                      "close": {
                        "hour": 0,
                        "minute": 0
                      }
                    }
                  ],
                  "wednesday": [
                    {
                      "open": {
                        "hour": 0,
                        "minute": 0
                      },
                      "close": {
                        "hour": 0,
                        "minute": 0
                      }
                    }
                  ],
                  "thursday": [
                    {
                      "open": {
                        "hour": 0,
                        "minute": 0
                      },
                      "close": {
                        "hour": 0,
                        "minute": 0
                      }
                    }
                  ],
                  "friday": [
                    {
                      "open": {
                        "hour": 0,
                        "minute": 0
                      },
                      "close": {
                        "hour": 0,
                        "minute": 0
                      }
                    }
                  ],
                  "saturday": [
                    {
                      "open": {
                        "hour": 0,
                        "minute": 0
                      },
                      "close": {
                        "hour": 0,
                        "minute": 0
                      }
                    }
                  ]
                },
                "current_status": "open"
              },
              "feature_id": "0x876a706c3b3261cb:0x33f6b261d1820973",
              "cid": "3744376273401678195",
              "latitude": 39.64065,
              "longitude": -106.37506669999999,
              "is_claimed": false,
              "local_justifications": null,
              "is_directory_item": false,
              "price_level": null,
              "hotel_rating": null
            }
          ]
        }
      ]
    }
  ]
}