use fmt;
use Display;
/// Client Type, either 'confidential' or 'public'.
///
/// See RFC 6749 Section 2.2. In particular:
/// <ul>
/// <li>If the client cannot be trusted with secrets, it is 'public'. This usually includes
/// all clients in end-user hands like javascript ones, but strictly speaking it depends
/// on your security model.</li>
/// </ul>