Remove stale SsoUser objects from database (#1560)

* Add SsoUser_ReadByUserIdOrganizationId

* Automatically reset stale/duplicate Sso links

* Fix typo

* Check for stale Sso link in existing user flow

* Delete any stale user record before provisioning new user

* Check for existing db query before creating

* PR feedback updates

Co-authored-by: Chad Scharf <3904944+cscharf@users.noreply.github.com>

util/Migrator/DbScripts/2021-09-02_00_SsoUserReadyByUserIdOrganizationId.sql

@@ -0,0 +1,21 @@
+IF OBJECT_ID('[dbo].[SsoUser_ReadByUserIdOrganizationId]') IS NOT NULL
+BEGIN
+    DROP PROCEDURE [dbo].[SsoUser_ReadByUserIdOrganizationId]
+END
+GO
+
+CREATE PROCEDURE [dbo].[SsoUser_ReadByUserIdOrganizationId]
+    @UserId UNIQUEIDENTIFIER,
+    @OrganizationId UNIQUEIDENTIFIER
+AS
+BEGIN
+    SET NOCOUNT ON
+
+    SELECT
+        *
+    FROM
+        [dbo].[SsoUserView]
+    WHERE
+        [UserId] = @UserId
+        AND [OrganizationId] = @OrganizationId
+END