Error handling refactor and 500 page/message templates

src/routes/admin/change_password.rs

@@ -1,5 +1,5 @@
 use crate::{
-    authentication::{self, AuthenticatedUser, Credentials, validate_credentials},
+    authentication::{self, AuthError, AuthenticatedUser, Credentials, validate_credentials},
     routes::{AdminError, AppError},
     startup::AppState,
     templates::MessageTemplate,
@@ -35,11 +35,14 @@ pub async fn change_password(
             "You entered two different passwords - the field values must match.".to_string(),
         )
         .into())
-    } else if validate_credentials(credentials, &connection_pool)
-        .await
-        .is_err()
-    {
-        Err(AdminError::ChangePassword("The current password is incorrect.".to_string()).into())
+    } else if let Err(e) = validate_credentials(credentials, &connection_pool).await {
+        match e {
+            AuthError::UnexpectedError(error) => Err(AdminError::UnexpectedError(error).into()),
+            AuthError::InvalidCredentials(_) => Err(AdminError::ChangePassword(
+                "The current password is incorrect.".to_string(),
+            )
+            .into()),
+        }
     } else if let Err(e) = verify_password(form.new_password.expose_secret()) {
         Err(AdminError::ChangePassword(e).into())
     } else {