How to change JWT Token stil alve before logout

I need help to figure out a issues. I am using laravel 5.1 for create web services for mobile app. I am using JWT for authentication and it returns a token.

Issue is that if I want to make token alive until user logout.that means when user login then token generate and it will be valid before user logout. when user logout then token will be invalid.

Please help me to get solution.

via Chebli Mohamed