Obtaining an On-Behalf-Of (OBO) Token

Prompt

const axios = require('axios');
const qs = require('querystring');

async function getOboToken(userAccessToken) {
    const { TENANT_ID, CLIENT_ID, MICROSOFT_PROVIDER_AUTHENTICATION_SECRET } = process.env;
    const params = {
        client_id: CLIENT_ID,
        client_secret: MICROSOFT\_PROVIDER\_AUTHENTICATION\_SECRET,
        grant_type: 'urn:ietf:params:oauth:grant-type:jwt-bearer',
        assertion: userAccessToken,
        requested_token_use: 'on_behalf_of',
        scope: 'https://graph.microsoft.com/.default'
    };

    const url = `https\://login.microsoftonline.com/${TENANT_ID}/oauth2/v2.0/token`;
    try {
        const response = await axios.post(url, qs.stringify(params), {
            headers: { 'Content-Type': 'application/x-www-form-urlencoded' }
        });
        return response.data.access\_token;
    } catch (error) {
        console.error('Error obtaining OBO token:', error.response?.data || error.message);
        throw error;
    }
}