Mario Database - Bug typo?

I 've tried to connect to my database, but the port 5432 just refuse my connection. Until I realize that there’s a typo with the “db.sql” file. It should write “username” but instead it is “usename”. I’ve tried to changed it but the previous database was deleted. It’s all empty. Since, as a learner, have nothing to do with the “source control file” it seems to be a bug that cause an issue.

Is there any possible ways to prevent this happening from the beginning of the course?

Thanks in advance.