By default, every command is based on a permission that is given only to operators by default.
So you must setup permissions before start to using them.
/llapi is the main command of LastLoginAPI, if you want to use that command without any sub-command you must have
lastloginapi.help permission set.
Structure of the command:
/llapi <sub command> [arguments]
On BungeeCord/Velocity the default command is
|Show help pages|
|Show player info|
|Reload plugin configuration files|
|Show plugin information|