example of LexikJWTAuthenticationBundle with Symfony 4.4

composer install

php bin/console lexik:jwt:generate-keypair

php bin/console doctrine:database:create

 php bin/console doctrine:migrations:migrate

symfony server:start

curl --location --request POST 'http://127.0.0.1:8000/sign-up' \
--header 'Content-Type: application/json' \
--data-raw '{
    "username": "example-user",
    "password": "1234a"
}'

{"status":200,"message":"success"}