Create macro for manual From impls for Error

src/main.rs

@@ -67,30 +67,24 @@ impl IntoResponse for Error {
     }
 }
 
-// We need to implement this manually because pbkdf2's Error type does not meet the bounds required
-// for `thiserror`
-impl From<pbkdf2::password_hash::Error> for Error {
-    fn from(e: pbkdf2::password_hash::Error) -> Self {
-        Self::Pbkdf2(e)
-    }
+macro_rules! manual_from {
+    ($($f:ty => $t:ident),*) => {
+        $(
+        impl From<$f> for Error {
+            fn from(source: $f) -> Self {
+                Self::$t(source)
+            }
+        }
+        )*
+    };
 }
 
-impl From<String> for Error {
-    fn from(e: String) -> Self {
-        Self::Other(e)
-    }
-}
-
-impl From<Redirect> for Error {
-    fn from(e: Redirect) -> Self {
-        Self::Redirect(e)
-    }
-}
-
-impl From<StatusCode> for Error {
-    fn from(c: StatusCode) -> Self {
-        Self::StatusCode(c)
-    }
+// We need to implement these manually because they don't meet the bounds set by thiserror
+manual_from! {
+    pbkdf2::password_hash::Error => Pbkdf2,
+    String => Other,
+    Redirect => Redirect,
+    StatusCode => StatusCode
 }
 
 #[derive(Deserialize, Debug, Clone)]