are there any iOS examples outside of https://supertokens.com/docs/ios/index.html that demonstrate an email sign up / sign in flow using the SDK? I have something kind of working but don't know how to get the supertokens lib to parse or get the token from my successful sign up response. I feel like I'm just manually doing stuff that I'm assuming the SDK would do but any of the functions that seem useful are private to the library such as the

Utils.saveTokenFromHeaders