curl --request POST \
  --url https://api.aisa.one/apis/v1/api-ninjas/get-population \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "offset": 0,
  "country": "Japan",
  "max_population": 100000000,
  "min_population": 1000000
}
'

import requests

url = "https://api.aisa.one/apis/v1/api-ninjas/get-population"

payload = {
    "offset": 0,
    "country": "Japan",
    "max_population": 100000000,
    "min_population": 1000000
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    offset: 0,
    country: 'Japan',
    max_population: 100000000,
    min_population: 1000000
  })
};

fetch('https://api.aisa.one/apis/v1/api-ninjas/get-population', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.aisa.one/apis/v1/api-ninjas/get-population",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'offset' => 0,
    'country' => 'Japan',
    'max_population' => 100000000,
    'min_population' => 1000000
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.aisa.one/apis/v1/api-ninjas/get-population"

	payload := strings.NewReader("{\n  \"offset\": 0,\n  \"country\": \"Japan\",\n  \"max_population\": 100000000,\n  \"min_population\": 1000000\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.aisa.one/apis/v1/api-ninjas/get-population")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"offset\": 0,\n  \"country\": \"Japan\",\n  \"max_population\": 100000000,\n  \"min_population\": 1000000\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.aisa.one/apis/v1/api-ninjas/get-population")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"offset\": 0,\n  \"country\": \"Japan\",\n  \"max_population\": 100000000,\n  \"min_population\": 1000000\n}"

response = http.request(request)
puts response.read_body

{
  "details": [
    {}
  ],
  "country_name": "<string>",
  "population_forecast": [
    {
      "year": 123,
      "population": 123,
      "rank": 123,
      "density": 123,
      "migrants": 123,
      "median_age": 123,
      "yearly_change": 123,
      "fertility_rate": 123,
      "urban_population": 123,
      "urban_population_pct": 123,
      "yearly_change_percentage": 123,
      "percentage_of_world_population": 123
    }
  ],
  "historical_population": [
    {
      "year": 123,
      "population": 123,
      "rank": 123,
      "density": 123,
      "migrants": 123,
      "median_age": 123,
      "yearly_change": 123,
      "fertility_rate": 123,
      "urban_population": 123,
      "urban_population_pct": 123,
      "yearly_change_percentage": 123,
      "percentage_of_world_population": 123
    }
  ]
}