Learning a new code base

1. Async keyword makes the fucntion return a promise and it allows you to use await in it. await keyword before a promise makes JS wait until that promise is settled and then returns a result or an error.
2. For any postgreSQL transaction it begins with a BEGIN and ends with a COMMIT.
3. Sequence tables are single-row tables created through the command line. Sequence objects are most often used for creation of unique identifiers.
4. RESTART IDENTITY CASCADE - when used with truncate resets teh sequences assoicated with the columns and adding cascade makes sure all the sequences of all affected tables are reset.
5.setval() -> will update your sequence and in this case make the id 1.