add and replace missing key error

Signed-off-by: wibe <[email protected]>

Sources/ImperialCore/Errors/SessionError.swift

@@ -6,22 +6,28 @@ public enum SessionError: Error, CustomStringConvertible, AbortError {
     /// Thrown when the user's access token is not found within the session's data
     case usernotAuthenticated
 
+    /// Throws Errors when no object is stored in the session with the given key, or decoding fails.
+    case keynotFound(String)
+
     public var description: String {
         switch self {
         case .usernotAuthenticated: return "User currently not authenticated"
+        case let .keynotFound(key): return "No element has been found with the key '\(key)'"
         }
     }
 
     public var reason: String {
         switch self {
         case .usernotAuthenticated: return description
+        case .keynotFound: return description
         }
     }
 
 
     public var status: HTTPStatus {
         switch self {
         case .usernotAuthenticated: return .unauthorized
+        case .keynotFound: return .internalServerError
         }
     }
 

Sources/ImperialCore/Helpers/Sessions+Imperial.swift

@@ -82,9 +82,10 @@ extension Session {
     /// - Returns: The JSON from the session, decoded to the type passed in.
     /// - Throws: Errors when no object is stored in the session with the given key, or decoding fails.
     public func get<T>(_ key: String, as type: T.Type) throws -> T where T: Codable {
+        let keynotfoundError = SessionError.keynotFound(key)
         guard let stored = data[key] else {
             if _isOptional(T.self) { return Optional<Void>.none as! T }
-            throw Abort(.internalServerError, reason: "No element found in session with ket '\(key)'")
+            throw keynotfoundError
         }
         return try JSONDecoder().decode(T.self, from: Data(stored.utf8))
     }