curl --request POST \
  --url https://auth.sandbox.lerian.net/v1/login/oauth/access_token \
  --header 'Content-Type: application/json' \
  --data '
{
  "grantType": "password",
  "clientId": "00000000-0000-0000-0000-000000000000",
  "clientSecret": "00000000-0000-0000-0000-000000000000",
  "code": "4%2F0AbCd...idp",
  "codeVerifier": "dBjftJeZ4CVP-mB92K27uhbUJU1p1r_wW1gFWFOEjXk",
  "password": "password",
  "state": "kQ7f...opaque",
  "username": "johndoe"
}
'

package main

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

func main() {

	url := "https://auth.sandbox.lerian.net/v1/login/oauth/access_token"

	payload := strings.NewReader("{\n  \"grantType\": \"password\",\n  \"clientId\": \"00000000-0000-0000-0000-000000000000\",\n  \"clientSecret\": \"00000000-0000-0000-0000-000000000000\",\n  \"code\": \"4%2F0AbCd...idp\",\n  \"codeVerifier\": \"dBjftJeZ4CVP-mB92K27uhbUJU1p1r_wW1gFWFOEjXk\",\n  \"password\": \"password\",\n  \"state\": \"kQ7f...opaque\",\n  \"username\": \"johndoe\"\n}")

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

	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))

}

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({
    grantType: 'password',
    clientId: '00000000-0000-0000-0000-000000000000',
    clientSecret: '00000000-0000-0000-0000-000000000000',
    code: '4%2F0AbCd...idp',
    codeVerifier: 'dBjftJeZ4CVP-mB92K27uhbUJU1p1r_wW1gFWFOEjXk',
    password: 'password',
    state: 'kQ7f...opaque',
    username: 'johndoe'
  })
};

fetch('https://auth.sandbox.lerian.net/v1/login/oauth/access_token', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://auth.sandbox.lerian.net/v1/login/oauth/access_token"

payload = {
    "grantType": "password",
    "clientId": "00000000-0000-0000-0000-000000000000",
    "clientSecret": "00000000-0000-0000-0000-000000000000",
    "code": "4%2F0AbCd...idp",
    "codeVerifier": "dBjftJeZ4CVP-mB92K27uhbUJU1p1r_wW1gFWFOEjXk",
    "password": "password",
    "state": "kQ7f...opaque",
    "username": "johndoe"
}
headers = {"Content-Type": "application/json"}

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

print(response.text)

{
  "accessToken": "eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ",
  "expiresIn": 3600,
  "refreshToken": "eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ",
  "tokenType": "Bearer",
  "idToken": "eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ",
  "scope": "openid profile email"
}

{
  "code": "AUT-0009",
  "fields": {},
  "message": "<string>",
  "title": "Bad Request"
}

{
  "code": "AUT-0009",
  "fields": {},
  "message": "<string>",
  "title": "Bad Request"
}

{
  "code": "AUT-0009",
  "fields": {},
  "message": "<string>",
  "title": "Bad Request"
}

{
  "code": "AUT-0009",
  "fields": {},
  "message": "<string>",
  "title": "Bad Request"
}

{
  "code": "AUT-0009",
  "fields": {},
  "message": "<string>",
  "title": "Bad Request"
}

{
  "code": "AUT-0009",
  "fields": {},
  "message": "<string>",
  "title": "Bad Request"
}