Optional Heroku settings

The following are defaulted or automatically set up, so you can ignore them unless you need to change the defaults:

Variable	Default
LOOP_SECONDS	15
LOCK_SECONDS	45
JAWSDB_MARIA_URL	Should already have been set up for you by the JawsDB Maria add-on.
WHITELIST_EXPIRY_SECONDS	How long an IP whitelisting should last. 86400 (24 hours) is a good default.
LOG_LEVEL	INFO (or DEBUG if you need it)

Also see Delegated authentication with Okta and Hashing Passwords for some additional settings.