Fix

src/Database/ReturnObjects/ProjectQuotaReturnObject.cs

 using System;
+using System.Collections.Generic;
 
 namespace Coscine.Database.ReturnObjects;
 
@@ -31,4 +32,9 @@ public class ProjectQuotaReturnObject
     /// How much maximum space is possible to be taken by resources [GiB] (See Database, Table 'ProjectQuotas', Column 'MaxQuota').
     /// </summary>
     public QuotaDimObject Maximum { get; set; }
+
+    /// <summary>
+    /// Resources quota for all individual resources of a resource type in a selected project.
+    /// </summary>
+    public IEnumerable<ResourceQuotaReturnObject> ResourcesQuota { get; set; }
 }
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