Digest
const val Digest: String
Digest Authentication described in the RFC-2069:
HA1 = MD5("$username:$realm:$password") // What's usually stored HA2 = MD5("$method:$digestURI") response = MD5("$HA1:$nonce:$HA2") // The client and the server sends and checks this.
see https://tools.ietf.org/html/rfc2069