NewMemProvider returns an new instance of the memTopics, which is implements the TopicsProvider interface.

MWC is the multi-level wildcard.

SEP is the topic level separator.

SWC is the single level wildcard.

SYS is the starting character of the system level topics.

ErrAuthFailure is returned when the user/pass supplied are invalid.

ErrAuthProviderNotFound is returned when the requested provider does not exist.

MaxQosAllowed is the maximum QOS supported by this server.

TopicsProvider.