push registration through relay apis

src/Core/Models/Api/Request/PushUpdateRequestModel.cs

@@ -0,0 +1,22 @@
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+
+namespace Bit.Core.Models.Api
+{
+    public class PushUpdateRequestModel
+    {
+        public PushUpdateRequestModel()
+        { }
+
+        public PushUpdateRequestModel(IEnumerable<string> deviceIds, string organizationId)
+        {
+            DeviceIds = deviceIds;
+            OrganizationId = organizationId;
+        }
+
+        [Required]
+        public IEnumerable<string> DeviceIds { get; set; }
+        [Required]
+        public string OrganizationId { get; set; }
+    }
+}