needs to update usage documentation for iOS13 & up

[ganico]

not sure if this repo is still active but the sample usage is not recommendable anymore since it's deprecated on ios13 so currently im trying to run ios15 so now I can't use the deprecated one.. I'm using the one who has a parameter of ASWebAuthenticationPresentationContextProviding but im still in progress and not sure if it'll work as expected.

[imthath-m]

let us know how it goes for you. I was able to log in once by passing ASWebAuthenticationPresentationContextProviding but was not able to persist the login across multiple launches of the app.