Postman OVH auth support

ovh.js

// environments to define
//   endpoint -> https://api.ovh.com/1.0
//   applicationKey
//   applicationSecret
//   consumerKey

// pre request script
pm.request.headers.add({
    key: 'X-Ovh-Application',
    value: pm.environment.get('applicationKey')
})
pm.request.headers.add({
    key: 'X-Ovh-Consumer',
    value: pm.environment.get('consumerKey')
})

function timeRelatedHeaders() {
    var apiTimeDiff = pm.variables.get("apiTimeDiff")
    var now = Math.round(Date.now()/1000) + apiTimeDiff

    var toSign = pm.environment.get('applicationSecret') + '+' + pm.environment.get('consumerKey') + '+' + pm.request.method + '+' + pm.variables.replaceIn(pm.request.url.toString()) + '+' + (pm.request.body.toString() || '') + '+' + now;

    var signature = '$1$' + CryptoJS.SHA1(toSign);
    pm.request.headers.add({
        key: 'X-Ovh-Signature',
        value: signature
    })

    pm.request.headers.add({
        key: 'X-Ovh-Timestamp',
        value: now 
    })
}

if (!pm.collectionVariables.has('apiTimeDiff')) {
    pm.sendRequest({
        url: "https://api.ovh.com/1.0/auth/time",
        method: "GET",
        headers: {
            'Content-Type': 'application/json; charset=utf-8'
        },
        body: {}
    },
    function (err, res) {
        
        pm.expect(err).to.not.be.ok;
        pm.expect(res).to.have.property('code', 200);
        pm.expect(res).to.have.property('status', 'OK');
        
        var serverTimestamp = res.text();
        var apiTimeDiff = serverTimestamp - Math.round(Date.now()/1000);
        pm.collectionVariables.set('apiTimeDiff', apiTimeDiff)

        timeRelatedHeaders()
    });
} else {
    console.log('skipped')
    timeRelatedHeaders()
}

console.debug(pm.request)