Changing JWT_TTL in .env doesn't work

[mokhosh]

Subject of the issue

Carbon methods are strongly typed. So, you can't provide seconds as a string.
This is what you get if you try to override JWT_TTL in your .env:

Carbon\Carbon::rawAddUnit(): Argument #3 ($value) must be of type int|float, string given

Steps to reproduce

Override JWT_TTL in your .env.