danger_string_to_atom.md

String.to_atom/1 is a danger

String.to_atom/* creates a new atom if one of its name wasn't use before, which is dangerous for dynamic/unknown data.

String.to_existing_atom/* does only allow you to convert strings to atoms when the atom already exists at that point via some other means of usage of it.

according to these:

• https://www.erlang.org/doc/efficiency_guide/introduction
• https://hexdocs.pm/credo/Credo.Check.Warning.UnsafeToAtom.html