[Bug] Improve SSO user provision flow (#1022)

* Initial commit of provisioning updates

* Updated strings

* removed extra BANG

* Separated orgUsers db lookup - prioritized existing user Id

* Updated create sso record method // Added sproc for org/email retrieval

util/Migrator/DbScripts/2020_12_04_00_OrgUserReadByOrgEmail.sql

@@ -0,0 +1,24 @@
+IF OBJECT_ID('[dbo].[OrganizationUser_ReadByOrganizationEmail]') IS NOT NULL
+BEGIN
+    DROP PROCEDURE [dbo].[OrganizationUser_ReadByOrganizationEmail]
+END
+GO
+
+CREATE PROCEDURE [dbo].[OrganizationUser_ReadByOrganizationIdEmail]
+    @OrganizationId UNIQUEIDENTIFIER,
+    @Email NVARCHAR(50)
+AS
+BEGIN
+    SET NOCOUNT ON
+
+    SELECT
+        *
+    FROM
+        [dbo].[OrganizationUserView]
+    WHERE
+        [OrganizationId] = @OrganizationId
+        AND [Email] IS NOT NULL
+        AND @Email IS NOT NULL
+        AND [Email] = @Email
+END
+GO