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/api/atom_api_session.cc
std::unique_ptr<brightray::DevToolsNetworkConditions> conditions;
  browser_context_->network_controller_handle()->SetNetworkState(
      devtools_network_emulation_client_id_, std::move(conditions));
  browser_context_->network_delegate()->SetDevToolsNetworkEmulationClientId(
      std::string());
}
void Session::SetCertVerifyProc(v8::Local<v8::Value> val,
                                mate::Arguments* args) {
  AtomCertVerifier::VerifyProc proc;
  if (!(val->IsNull() || mate::ConvertFromV8(args->isolate(), val, &proc))) {
    args->ThrowError("Must pass null or function");
    return;
  }
  BrowserThread::PostTask(BrowserThread::IO, FROM_HERE,
      base::Bind(&SetCertVerifyProcInIO,
                 make_scoped_refptr(browser_context_->GetRequestContext()),
                 proc));
}
void Session::SetPermissionRequestHandler(v8::Local<v8::Value> val,