getUser throw 404 if prefix defined

[nueko]

using webpack, node 6.x npm 5.x

const Couch = PouchDB.defaults({
  prefix: "http://127.0.0.1:5984",
  skip_setup: true
});

const db = new Couch({
  name: "speda"
});
db.getUser('foo', function (err, response) {
  if (err) {
    if (err.name === 'not_found') {
      // typo, or you don't have the privileges to see this user
    } else {
      // some other error
    }
  } else {
    // response is the user object
  }
});

G)

[nueko]

After some digs, I reproduced the issue when i use prefix options.
also options provided by defaults static method not merged