Transactionally safe user password and email change updates.

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

@@ -0,0 +1,16 @@
+CREATE PROCEDURE [dbo].[User_UpdateEmailPassword]
+    @Id UNIQUEIDENTIFIER,
+    @Email NVARCHAR(50),
+    @MasterPassword NVARCHAR(300),
+    @SecurityStamp NVARCHAR(50)
+AS
+BEGIN
+    UPDATE
+        [dbo].[User]
+    SET
+        [Email] = @Email,
+        [MasterPassword] = @MasterPassword,
+        [SecurityStamp] = @SecurityStamp
+    WHERE
+        [Id] = @Id
+END