A ship Captain
There is at least one Captain in each Spaceship. They can invite, promote, kick and even ban players on their ship. If you create a ship, you will automatically become a captain. Every captain can be seen with a blue name.
Team Manager
If you have the Captain rank, you can moderate your team by clicking the Team Manager button in the lower right corner of the screen.
The Captain rank is obtained by creating a team or being promoted by another Captain.You can use the Team Manager to ban troublemakers (or anyone you don't want in your ship life thieves) from your team. Note that the ban system is not perfect, especially in its current state. If griefers continue to raid your ship, you should set your team to Invite-Only.
Private teams can be made by setting a team to Invite-Only, and sending the invite link to your friends. When that friend joins they will automatically become a Crew member. Note that anyone who has joined your team in the past and has not been banned will still be allowed to join your Invite-Only team.
If you want to forget ship, for example if it got created by accident, then you can use "Demote Self" option to demote yourself to Guest (Consequences of using this option can`t be reversed, so be accurate)
History
The management system and captain rank has been added in update MARCH 2, 2019: VERSION ALEPH 9.
In ℵ13 version which got released at 11th of April 2019, Auto-Promotion got removed from team manager because of save system update.