Creating a per-user Database in CouchDB with nano.

couch.js

exports.findOrCreateDB = function (config, creds, cb) {

  let nano   = require('nano')(`http://${config.couch_admin}:${config.couch_password}@${config.couch_host}:${config.couch_port}`),
      users  = nano.use('_users'),
      userDB = nano.use(creds.username),
      log    = console.log.bind(console, "[DEBUG]"),

      user   = {
        _id     : "org.couchdb.user:" + creds.username,
        name    : creds.username,
        roles   : [],
        type    : "user",
        password: creds.password
      },

      secObj = {
        admins : {
          names: [],
          roles: []
        },
        members: {
          names: [creds.username],
          roles: []
        }
      };

  log(user);

  users.insert(user, user._id, (err, user_body) => {
    if (err) {
      log('[_users.insert] ', err.message);
    } else {
      console.log('user created.');
      nano.db.create(creds.username, (err, db_body) => {
        if (err) {
          log('[db.create] ', err.message, user_body);
        } else {
          console.log('database created!', db_body);
          userDB.insert(secObj, "_security", err => {
                if (err) {
                  log('[_security.insert] ', err.message);
                }
              }
          )
        }
      });
    }
  });
};