The RocketJoin conditions system is based on the RocketPlaceholders system, you can learn more about it by clicking here.
Example of configuration:
conditions:
example-vip:
# type of the condition
type: PERMISSION
# Optional: Value
value: "rocketjoin.vip"
# Join and leave message
join: "&e&l» &6&lVIP &7{player} joined!"
leave: "&e&l» &6&lVIP &7{player} left!"
# Sound options
sound: true
sound-type: "" # List: https://hub.spigotmc.org/javadocs/bukkit/org/bukkit/Sound.html
# Fireworks options
fireworks: false
fireworks-amount: 3
# Commands to execute on join. Placeholders: {player}
commands: []