Add the opensmtpd_derive crate

src/data_structures/auth_result.rs

@@ -1,31 +0,0 @@
-use std::str::FromStr;
-
-#[derive(Clone, Debug, Eq, PartialEq)]
-pub enum AuthResult {
-    Pass,
-    Fail,
-    Error,
-}
-
-impl ToString for AuthResult {
-    fn to_string(&self) -> String {
-        match self {
-            AuthResult::Pass => String::from("pass"),
-            AuthResult::Fail => String::from("fail"),
-            AuthResult::Error => String::from("error"),
-        }
-    }
-}
-
-impl FromStr for AuthResult {
-    type Err = ();
-
-    fn from_str(s: &str) -> Result<Self, Self::Err> {
-        match s {
-            "pass" => Ok(AuthResult::Pass),
-            "fail" => Ok(AuthResult::Fail),
-            "error" => Ok(AuthResult::Error),
-            _ => Err(()),
-        }
-    }
-}