Authentication with node.js, nano and CouchDB -

is there way change config parameters in nano after initialization? i'd init nano with:

nano = require('nano')('http://127.0.0.1:5984') 

and later change user , password, after user submits login form. error:

nano.cfg.user = params.user.name typeerror: cannot set property 'user' of undefined 

or should fork nano , write auth function adjust values?

i can't test right now, but, looking @ sources, can note 2 things:

• that configuration is exposed config, not cfg;
• that config option connection url.

then think need set url configuration option new value authentication parameters:

nano.config.url = 'http://' + params.user.name + ':' + params.user.password + '@localhost:5984'; 

or can keep configuration object in couch.example.js , like:

cfg.user = params.user.name; cfg.pass = params.user.password; nano.config.url = cfg.url; 

update: here's complete example:

var cfg = {   host: "localhost",   port: "5984",   ssl: false };  cfg.credentials = function credentials() {   if (cfg.user && cfg.pass) {     return cfg.user + ":" + cfg.pass + "@";   }   else { return ""; } };  cfg.url = function () {   return "http" + (cfg.ssl ? "s" : "") + "://" + cfg.credentials() + cfg.host +     ":" + cfg.port; };  var nano = require('nano')(cfg.url()),   db = nano.use('db_with_auth'),   docid = 'document_id';  function setuserpass(user, pass) {   cfg.user = user;   cfg.pass = pass;   nano.config.url = cfg.url(); }  db.get(docid, function (e, r, h) {   if (e) {     if (e['status-code'] === 401) {       console.log("trying again authentication...");       setuserpass('usename', 'password');       db.get(docid, function (e, r, h) {         if (e) {           console.log("sorry, did not work:");           return console.error(e);         }         console.log("it worked:");         console.log(r);         console.log(h);       });       return;     }     console.log("hmmm, went wrong:");     return console.error(e);   }   console.log("no auth required:");   console.log(r);   console.log(h); });