Pascal Pfiffner

It's not well documented but you can use [`OAuth2DebugURLSessionDelegate`](https://p2.github.io/OAuth2/Classes/OAuth2DebugURLSessionDelegate.html) for this: ``` swift self.oauth = OAuth2...(settings: [:]) oauth.sessionDelegate = OAuth2DebugURLSessionDelegate(host: "domain.com") oauth.authorize() { params, error in // ... } ```

`params` is expected to be nil when authorization doesn't succeed – it would contain authorization parameters. Can you try to debug, set a breakpoint in [OAuth2DebugURLSessionDelegate#42](https://github.com/p2/OAuth2/blob/master/Sources/Base/OAuth2DebugURLSessionDelegate.swift#L43)? Which version are you...

Set a break point at [OAuth2Base.swift#220](https://github.com/p2/OAuth2/blob/swift-2.3/Sources/Base/OAuth2Base.swift#L220) to check whether the session is correctly initiated.

When you step through, does it create a new session (line 222) and does it use your `sessionDelegate` on that same line?

I just tried with the 2.3 version, the breakpoint should be set in [OAuth2Request.swift#71](https://github.com/p2/OAuth2/blob/swift-2.3/Sources/Base/OAuth2Request.swift#L71). It breaks for me, so this should work. I'm not sure if the IP-based thing works,...

Did you get this to work?

Great, thanks for the code example!

Are the breakpoints mentioned above being called?

Which version of the OAuth2 framework are you using, and how (Pod, Carthage, source)?

@aliasdoc Were you able to resolve this issue? If not, do you have a public-facing server with the self-signed certificate so I can test with?