Coding seems cool without error checks, does not it? When if/else checks effect the next execution behaviors, then the code becomes a mess. Luckily, there is a pattern called ‘Railway Oriented Programming’ for error handling.

https://medium.com/@mustafaturan/railway-oriented-programming-in-elixir-with-pattern-matching-on-function-level-and-pipelining-e53972cede98