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_url_request.h
public:
    void SetFlag(Flags flag);
   protected:
    explicit StateBase(Flags initialState);
    bool operator==(Flags flag) const;
    bool IsFlagSet(Flags flag) const;
   private:
    Flags state_;
  };
  enum class RequestStateFlags {
    kNotStarted = 0x0,
    kStarted = 0x1,
    kFinished = 0x2,
    kCanceled = 0x4,
    kFailed = 0x8,
    kClosed = 0x10
  };
  class RequestState : public StateBase<RequestStateFlags> {