MQTT server credentials

[Dinth]

Hi. This tool looks exactly like something what i need, but it doesn't support logging to MQTT server using credentials.
Would you be able to add this @ksjoberg please?

[Dinth]

OK, this was simple, i have just added:

module.USER = "..."
module.PASS = "..."

in config.lua, and changed:
m = mqtt.Client(config.ID, 120)
to:
m = mqtt.Client(config.ID, 120, config.USER, config.PASS)
in application.lua

Do you want me to commit?