fix: delete separated User models

and do something related with #9

flo/AuthViewModel.swift

···
 import KeychainAccess
 
 class AuthViewModel: ObservableObject {
-  @Published var user: User?
+  @Published var user: UserAuth?
 
   @Published var serverUrl: String = ""
   @Published var username: String = ""
···
           self.login()
         } else {
 
-          self.user = User(
+          self.user = UserAuth(
             id: data.id, username: data.username, name: data.name, isAdmin: data.isAdmin,
             lastFMApiKey: data.lastFMApiKey)
           self.isLoggedIn = true
···
       AuthService.shared.setCreds(data)
       UserDefaultsManager.serverBaseURL = self.serverUrl
 
-      self.user = User(
+      self.user = UserAuth(
         id: data.id, username: data.username, name: data.name, isAdmin: data.isAdmin,
         lastFMApiKey: data.lastFMApiKey)
     } catch {

flo/Shared/Models/User.swift

···
-//
-//  User.swift
-//  flo
-//
-//  Created by rizaldy on 09/06/24.
-//
-
-import Foundation
-
-struct User: Codable {
-  let id: String
-  let username: String
-  let name: String
-  let isAdmin: Bool
-  let lastFMApiKey: String
-}

flo/Shared/Models/UserAuth.swift

···
   let subsonicSalt: String
   let subsonicToken: String
   let token: String
+
+  init(
+    id: String, username: String, name: String, isAdmin: Bool, lastFMApiKey: String = "",
+    subsonicSalt: String = "", subsonicToken: String = "", token: String = ""
+  ) {
+    self.id = id
+    self.name = name
+    self.username = username
+    self.isAdmin = isAdmin
+    self.lastFMApiKey = lastFMApiKey
+    self.subsonicSalt = subsonicSalt
+    self.subsonicToken = subsonicToken
+    self.token = token
+  }
+
+  init(from decoder: any Decoder) throws {
+    let container = try decoder.container(keyedBy: CodingKeys.self)
+
+    self.id = try container.decode(String.self, forKey: .id)
+    self.name = try container.decode(String.self, forKey: .name)
+    self.username = try container.decode(String.self, forKey: .username)
+    self.isAdmin = try container.decode(Bool.self, forKey: .isAdmin)
+    self.lastFMApiKey = try container.decodeIfPresent(String.self, forKey: .lastFMApiKey) ?? ""
+    self.subsonicSalt = try container.decode(String.self, forKey: .subsonicSalt)
+    self.subsonicToken = try container.decode(String.self, forKey: .subsonicToken)
+    self.token = try container.decode(String.self, forKey: .token)
+  }
 }