curl --request POST \
  --url https://api.kodelabs.com/oauth2/v1/token \
  --header 'Content-Type: application/x-www-form-urlencoded' \
  --data grant_type=client_credentials \
  --data scope=bms \
  --data client_assertion_type=urn:ietf:params:oauth:client-assertion-type:jwt-bearer \
  --data 'client_assertion=<string>'

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/x-www-form-urlencoded'},
  body: new URLSearchParams({
    grant_type: 'client_credentials',
    scope: 'bms',
    client_assertion_type: 'urn:ietf:params:oauth:client-assertion-type:jwt-bearer',
    client_assertion: '<string>'
  })
};

fetch('https://api.kodelabs.com/oauth2/v1/token', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://api.kodelabs.com/oauth2/v1/token"

payload = {
    "grant_type": "client_credentials",
    "scope": "bms",
    "client_assertion_type": "urn:ietf:params:oauth:client-assertion-type:jwt-bearer",
    "client_assertion": "<string>"
}
headers = {"Content-Type": "application/x-www-form-urlencoded"}

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

print(response.text)

$headers=@{}
$headers.Add("Content-Type", "application/x-www-form-urlencoded")
$response = Invoke-WebRequest -Uri 'https://api.kodelabs.com/oauth2/v1/token' -Method POST -Headers $headers -ContentType 'application/x-www-form-urlencoded' -Body 'grant_type=client_credentials&scope=bms&client_assertion_type=urn%3Aietf%3Aparams%3Aoauth%3Aclient-assertion-type%3Ajwt-bearer&client_assertion=%3Cstring%3E'

{
  "access_token": "<string>",
  "token_type": "Bearer",
  "expires_in": 3600,
  "scope": "bms"
}