CheckFatal prints an error and exits with error code 1 if err is non-nil.

InitLogger initialises the global gokit logger (util_log.Logger) and overrides the default logger for the server.

WarnExperimentalUse logs a warning and increments the experimental features metric.

WithContext returns a log.Logger that has information about the current user in its details.

WithUserID returns a Logger that has information about the current user in its details.

Logger is a shared go-kit logger.