delete ssouser on org and user delete (#902)

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

@@ -23,6 +23,12 @@ BEGIN
         COMMIT TRANSACTION Organization_DeleteById_Ciphers
     END
 
+    DELETE
+    FROM
+        [dbo].[SsoUser]
+    WHERE
+        [OrganizationId] = @Id
+
     DELETE
     FROM
         [dbo].[Organization]