Let a session decide if is valid or not

Author: LetoFranco

ios-base/Common/Models/Session.swift

@@ -14,6 +14,8 @@ struct Session: Codable {
   var accessToken: String?
   var expiry: Date?
 
+  var isValid: Bool { [uid, accessToken, client].allSatisfy { $0 != nil } }
+  
   private enum CodingKeys: String, CodingKey {
     case uid
     case client

ios-base/Managers/SessionManager.swift

@@ -32,10 +32,6 @@ class SessionManager: NSObject {
   }
 
   static var validSession: Bool {
-    if let session = currentSession, let uid = session.uid,
-       let tkn = session.accessToken, let client = session.client {
-      return !uid.isEmpty && !tkn.isEmpty && !client.isEmpty
-    }
-    return false
+    currentSession?.isValid ?? false
   }
 }