Generate a random 32 bit token.

 

Token:
U7G4PIEKH00LRD8mDa0xWXqQBUTOxYtd

This page generated a token that can be used to assign encryption key, in app/Config/App.php

Alternativly you can use the command line utility and type:

php forge key:generate

In a terminal window/ssh when on the root of the project, this will automatically set the key for you.