let auth = try MatrixAuth(clientId: ..., clientSecret: ...)
let username = "[email protected]"
let password = ...

auth.authenticate(username: username, password: password) { result in
    switch result {
    case let .success(user):
        // Do stuff with user
        ...
    case let .failure(error):
        // Authentication failure; handle error
        ...
    }
}

let user: UserAuth = ...

user.details { result in
    switch result {
    case let .success(details):
        // Prints the details of the user as returned by the AdMobilize API
        print(details)
    case let .failure(error):
        // Handle error
        ...
    }
}

let user: UserAuth = ...
let device: String = ...

user.deviceSecret(for: device) { result in
    switch result {
    case let .success(secret):
        // Prints the secret for `device` belonging to `user`
        print(secret)
    case let .failure(error):
        // Handle error
        ...
    }
}

let auth: MatrixAuth = ...

auth.registerNewUser(username: ..., password: ..., role: ...) { result in
    switch result {
    case let .success(value):
        // Do stuff with API response
        ...
    case let .failure(error):
        // Handle error
        ...
    }
}

let auth: MatrixAuth = ...

auth.forgotPassword(username: ...) { result in
    switch result {
    case let .success(value):
        // Do stuff with API response
        ...
    case let .failure(error):
        // Handle error
        ...
    }
}