In case someone wants to figure it out and start at home, then go through these steps :

1. Install erlang in your machine Click this instruction.

2. Enter into erl: write in your console erl.

3. Compile main.erl file: c(main).

4. Users = main:get_users().

5. Done now you can use functions where user list is used

   For example:

   main:split_by_age(Users).

6. Come again!