Provides util method to get a proper error message + refactoring

LeStorage/Services.swift

@@ -14,13 +14,6 @@ public enum HTTPMethod: String, CaseIterable, Codable {
     case delete = "DELETE"
 }
 
-public enum ServiceError: Error {
-    case urlCreationError(url: String)
-    case cantConvertToUUID(id: String)
-    case missingUserName
-    case responseError(response: String)
-}
-
 fileprivate enum ServiceConf: String {
     case createAccount = "users/"
     case requestToken = "api-token-auth/"

LeStorage/Utils/Errors.swift

@@ -7,6 +7,26 @@
 
 import Foundation
 
+public class ErrorUtils {
+    
+    public static func message(error: Error) -> String {
+        switch error {
+        case ServiceError.responseError(let reason):
+            return reason
+        default:
+            return error.localizedDescription
+        }
+    }
+    
+}
+
+public enum ServiceError: Error {
+    case urlCreationError(url: String)
+    case cantConvertToUUID(id: String)
+    case missingUserName
+    case responseError(response: String)
+}
+
 public enum UUIDError: Error {
     case cantConvertString(string: String)
 }