Will be nice to clear auth credentials. For example, I'm using a proxy that accepts options via username:

```
proxy.com:8080
user: wiliam_country_US
```

So, if I want to change the peer node, I change my username:

```
proxy.com:8080
user: wiliam_country_GB
```

But, I'm not changing the proxy, so electron has valid credentials and is not going to trigger `login` event.

I'm searching the way to clean auth settings so electron asks them again.
atom/browser/net/atom_url_request.cc
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
  
  
  
  is_chunked_upload_ = is_chunked_upload;
}
void AtomURLRequest::Cancel() {
  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
  content::BrowserThread::PostTask(content::BrowserThread::IO, FROM_HERE,
                                   base::Bind(&AtomURLRequest::DoCancel, this));
}
void AtomURLRequest::SetExtraHeader(const std::string& name,
                                    const std::string& value) const {
  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
  content::BrowserThread::PostTask(
      content::BrowserThread::IO, FROM_HERE,
      base::Bind(&AtomURLRequest::DoSetExtraHeader, this, name, value));
}
void AtomURLRequest::RemoveExtraHeader(const std::string& name) const {
  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
  content::BrowserThread::PostTask(
      content::BrowserThread::IO, FROM_HERE,
      base::Bind(&AtomURLRequest::DoRemoveExtraHeader, this, name));
}
void AtomURLRequest::PassLoginInformation(