HTML:

<h1>Permissions: </h1>

welcomemessage.use: Allows access to the /welcomemessage command.
welcomemessage.edit: Allows editing welcome messages.
welcomemessage.show: Allows showing the welcome message.
welcomemessage.togglepa: Allows toggling PlaceholderAPI.

HTML:

<h1>Commands: </h1>

/welcomemessage: Manage welcome messages.
/welcomemessage edit <addline/removeline/editline>: Edit welcome messages.
/welcomemessage show: Show the welcome message.
/welcomemessage help: Display command information.
/welcomemessage togglepa: Toggle PlaceholderAPI.