Console application, aimed to greet the person or AI who runs it.

1. When the application is starting, it uniquely identifies the pair: unique environment (env), where it's executing and unique user who currently logged in to the system and runs the application.
2. If such unique_identifier already registered in application database (select * from users where environment = XXX and user = YYY)
3. Then application just reads this information from a database and greets the user. Steps below skipped.
4. If unique_identifier was not found, then application treats current env and user as new one and creates new entry in database.
5. Then application reads new entry from a database and prints the greeting to console.

• Unique identifier = env + user
• Same env can have multiple users

• Columns environment and user are the part of composite primary_key
• Index on environment+user columns to be created

$ mvn -U clean install
$ java -jar target/hello-world.jar

• Java 17
• Maven
• Junit 5
• Database TBD
• TBD

• Checkstyle