U2F (#1304)

* Delete U2F tokens alongside WebAuthn

* Bring back u2f apis

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

@@ -224,6 +224,27 @@ namespace Bit.Core.Models.Api
         }
     }
 
+    public class TwoFactorU2fRequestModel : TwoFactorU2fDeleteRequestModel
+    {
+        [Required]
+        public string DeviceResponse { get; set; }
+        public string Name { get; set; }
+    }
+
+    public class TwoFactorU2fDeleteRequestModel : TwoFactorRequestModel, IValidatableObject
+    {
+        [Required]
+        public int? Id { get; set; }
+
+        public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
+        {
+            if (!Id.HasValue || Id < 0 || Id > 5)
+            {
+                yield return new ValidationResult("Invalid Key Id", new string[] { nameof(Id) });
+            }
+        }
+    }
+
     public class TwoFactorWebAuthnRequestModel : TwoFactorWebAuthnDeleteRequestModel
     {
         [Required]