typedef axl_bool(* VortexSaslAuthPlain)(VortexConnection *connection, const char *auth_id, const char *authorization_id, const char *password)

Asynchronous notification to enable user space code to validate SASL PLAIN request received.

Function using this handler are:

connection The connection where the SASL notification was received.
auth_id User identifier
authorization_id User identifier which is acting on behalf of.
password Current user password
axl_true to accept incoming SASL request or axl_false to deny it.