[AltStoreCore] Refactors PatreonAPI to reduce duplicate logic

AltStoreCore/Patreon/UserAccount.swift

@@ -0,0 +1,49 @@
+//
+//  Account.swift
+//  AltStoreCore
+//
+//  Created by Riley Testut on 11/3/23.
+//  Copyright © 2023 Riley Testut. All rights reserved.
+//
+
+import Foundation
+
+extension PatreonAPI
+{
+    typealias UserAccountResponse = DataResponse<UserAccountAttributes, AnyRelationships>
+    
+    struct UserAccountAttributes: Decodable
+    {
+        var first_name: String?
+        var full_name: String
+    }
+}
+
+extension PatreonAPI
+{
+    public struct UserAccount
+    {
+        var name: String
+        var firstName: String?
+        var identifier: String
+        
+        // Relationships
+        var pledges: [Patron]?
+        
+        init(response: UserAccountResponse, including included: IncludedResponses?)
+        {
+            self.identifier = response.id
+            self.name = response.attributes.full_name
+            self.firstName = response.attributes.first_name
+            
+            guard let included else { return }
+            
+            let patrons = included.patrons.values.compactMap { response -> Patron? in
+                let patron = Patron(response: response, including: included)
+                return patron
+            }
+            
+            self.pledges = patrons
+        }
+    }
+}