curl --request POST \
  --url 'https://oauth.msu.io/oauth/token' \
  --header 'Content-Type: application/x-www-form-urlencoded' \
  --header 'Authorization: Basic base64({CLIENT_ID}:{CLIENT_SECRET})' \
  --data 'grant_type=authorization_code&code={AUTHORIZATION_CODE}&redirect_uri={REDIRECT_URI}'

curl --request POST \
  --url 'https://oauth.msu.io/oauth/token' \
  --header 'Content-Type: application/x-www-form-urlencoded' \
  --header 'Authorization: Basic base64({CLIENT_ID}:{CLIENT_SECRET})' \
  --data 'grant_type=refresh_token&refresh_token={REFRESH_TOKEN}'

const response = await fetch('https://oauth.msu.io/oauth/token', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/x-www-form-urlencoded',
    'Authorization': `Basic ${btoa('{CLIENT_ID}:{CLIENT_SECRET}')}`
  },
  body: new URLSearchParams({
    grant_type: 'authorization_code',
    code: '{AUTHORIZATION_CODE}',
    redirect_uri: '{REDIRECT_URI}'
  })
});
const data = await response.json();

import requests
import base64

credentials = base64.b64encode(b'{CLIENT_ID}:{CLIENT_SECRET}').decode()

response = requests.post(
  'https://oauth.msu.io/oauth/token',
  headers={
    'Content-Type': 'application/x-www-form-urlencoded',
    'Authorization': f'Basic {credentials}'
  },
  data={
    'grant_type': 'authorization_code',
    'code': '{AUTHORIZATION_CODE}',
    'redirect_uri': '{REDIRECT_URI}'
  }
)
data = response.json()

{
  "access_token": "eyJhbGciOiJSUzI1NiIsImtpZCI6Im1zdS1vYXV0aCIsInR5cCI6IkpXVCJ9...",
  "token_type": "Bearer",
  "expires_in": 600,
  "refresh_token": "eyJhbGciOiJSUzI1NiIsImtpZCI6Im1zdS1vYXV0aCIsInR5cCI6IkpXVCJ9...",
  "scope": "enhancement"
}