Laravel + JWT

Hello, I'm trying to learn how JWT works with Laravel. I'm using the following library: https://github.com/tymondesigns/jwt-auth.

This is what I understood so far:

1. The user login. By loggin in, the application returns a token. This token contains the user credencials encrypted.

2. Whenever the user requests for information, the requests needs to have that given token in the header like: Authorization: Bearer {token}.

Now, thats the easy part, but there are a few things I get pretty confusing. For example:

1. What if the token expires? The user needs to write its credentials again?

2. How do I retrieve the information sent?

Thanks in advance!