Login methods

List of the different login methods used by the server list and /server.

pass - None/Pass
sasl - SASL (username + password)
external - SASL EXTERNAL (certificate)
msg - NickServ (/MSG NickServ + password)
nickserv - NickServ (/NickServ + password)
auth - Challenge Auth (username + password) (HMAC-SHA-256 if available, otherwise HMAC-SHA-1)
scram - SASL SCRAM (username + password) (SCRAM-SHA-256 if available, otherwise SCRAM-SHA-1)