add support for storing u2f challenges

src/Sql/dbo/Stored Procedures/U2f_Create.sql

@@ -0,0 +1,33 @@
+CREATE PROCEDURE [dbo].[U2f_Create]
+    @Id INT,
+    @UserId UNIQUEIDENTIFIER,
+    @KeyHandle VARCHAR(50),
+    @Challenge VARCHAR(50),
+    @AppId VARCHAR(50),
+    @Version VARCHAR(50),
+    @CreationDate DATETIME2(7)
+AS
+BEGIN
+    SET NOCOUNT ON
+
+    INSERT INTO [dbo].[U2f]
+    (
+        [Id],
+        [UserId],
+        [KeyHandle],
+        [Challenge],
+        [AppId],
+        [Version],
+        [CreationDate]
+    )
+    VALUES
+    (
+        @Id,
+        @UserId,
+        @KeyHandle,
+        @Challenge,
+        @AppId,
+        @Version,
+        @CreationDate
+    )
+END