inbox: store user's inbox keys (#47)

Notesnook.API/Models/Responses/UserResponse.cs

@@ -15,6 +15,9 @@ namespace Notesnook.API.Models.Responses
         [JsonPropertyName("monographPasswordsKey")]
         public EncryptedData MonographPasswordsKey { get; set; }
 
+        [JsonPropertyName("inboxKeys")]
+        public InboxKeys InboxKeys { get; set; }
+
         [JsonPropertyName("subscription")]
         public ISubscription Subscription { get; set; }
 

Notesnook.API/Models/UserKeys.cs

@@ -23,5 +23,12 @@ namespace Notesnook.API.Models
   {
     public EncryptedData AttachmentsKey { get; set; }
     public EncryptedData MonographPasswordsKey { get; set; }
+    public InboxKeys InboxKeys { get; set; }
+  }
+
+  public class InboxKeys
+  {
+    public string Public { get; set; }
+    public EncryptedData Private { get; set; }
   }
 }

Notesnook.API/Models/UserSettings.cs

@@ -41,6 +41,7 @@ namespace Notesnook.API.Models
         public EncryptedData VaultKey { get; set; }
         public EncryptedData AttachmentsKey { get; set; }
         public EncryptedData MonographPasswordsKey { get; set; }
+        public InboxKeys InboxKeys { get; set; }
         public Limit StorageLimit { get; set; }
 
         [BsonId]