This plugin was made so my Twitch and Youtube viewers can join as G host. Ghost can see other ghost but normal whitelisted players can't. Ghost can't execute any commands. It's like spectator mode in a way.

Version:
Use MC verision 1.21.5 Spigot

Instructions and commands:
To whitelist yourself go to server console and type: ghost add username
after adding yourself to the whitelist you should be able to /ghost add username from normal mc chat

To remove a player from the whitelist. type: /ghostremove username

To see whitelisted players and ghost. type: /ghostlist