Added device identifier, APIs for updating token by identifier, Device creation/update upon signin.

src/Api/Models/Request/DeviceRequestModels.cs

@@ -0,0 +1,52 @@
+using System;
+using System.ComponentModel.DataAnnotations;
+using Bit.Core.Domains;
+using Bit.Core.Enums;
+using Newtonsoft.Json;
+
+namespace Bit.Api.Models
+{
+    public class DeviceRequestModel
+    {
+        [Required]
+        public DeviceType? Type { get; set; }
+        [Required]
+        [StringLength(50)]
+        public string Name { get; set; }
+        [Required]
+        [StringLength(50)]
+        public string Identifier { get; set; }
+        [StringLength(255)]
+        public string PushToken { get; set; }
+
+        public Device ToDevice(string userId = null)
+        {
+            return ToDevice(new Device
+            {
+                UserId = new Guid(userId)
+            });
+        }
+
+        public Device ToDevice(Device existingDevice)
+        {
+            existingDevice.Name = Name;
+            existingDevice.Identifier = Identifier;
+            existingDevice.PushToken = PushToken;
+            existingDevice.Type = Type.Value;
+
+            return existingDevice;
+        }
+    }
+
+    public class DeviceTokenRequestModel
+    {
+        [StringLength(255)]
+        public string PushToken { get; set; }
+
+        public Device ToDevice(Device existingDevice)
+        {
+            existingDevice.PushToken = PushToken;
+            return existingDevice;
+        }
+    }
+}