Argument 3 passed to Lcobucci\JWT\Signer\Hmac::doVerify() must be an instance of Lcobucci\JWT\Signer\Key, null given, code example

Example: Jwt Authentication error Argument 3 passed to Lcobucci\JWT\Signer\Hmac::doVerify()

#Here's complete snippet

php artisan key:generate
php artisan jwt:secret
php artisan cache:clear
php artisan config:clear
# Before run above commands make sure there is install jwt package, than check its config file name jwt.php in config folder.