[HELP] oAuth 2.0 Grant Type doesnt accept authorization_code

    data: {
      error: 'unsupported_grant_type',
      message: 'The authorization grant type is not supported by the authorization server.',
      hint: 'Check the `grant_type` parameter'
    }

    axios.post(
        'https://myanimelist.net/v1/oauth2/token', 
        {
            "client_id": process.env.MAL_CLIENT_ID,
            "grant_type": "authorization_code",
            "code": urlCode,
            "code_verifier": pkce_verifier
        },  
        {
            headers: {
                'Authorization': `Basic ${Buffer.from(process.env.MAL_CLIENT_ID+":"+process.env.MAL_CLIENT_SECRET).toString('base64')}`,
                'Content-Type': 'application/x-www-form-urlencoded'
            }
        }
    )
    .then(function (response) {
        console.log(response);
      })
      .catch(function (error) {
        console.log(error);
      });