To prepare the application for work, you need:

First step:

you need to create mysql database with name 'car_rental_spring';

CREATE DATABASE car_rental_spring;

Second step:

you need to customize your application.properties file:

{

#for connect with your MySQL server

spring.datasource.username=

spring.datasource.password=

#for javaMailSender spring.mail.host=

spring.mail.username=

spring.mail.password=

spring.mail.port=

spring.mail.protocol=

mail.debug=

}