class UserInformationHandler {

	// MARK: - Public api
	func retrieve() {
		let data = request()
		let user = parse(data: data)
		store(user: user)
	}
}

private extension UserInformationHandler {
	func request() -> Data {
		// Interaction with the api
		// Synchronous call for simplicity
	}

	func parse(data: Data) -> [String: Any] {
		// parse data an create a dictionary
	}

	func store(user: [String: Any]) {
		// Store on your local database, the information of the user
	}
}