add minimal ms sql create oidc view script

Author: karmaking

obp-api/src/main/scripts/sql/OIDC/README.md

@@ -1,3 +1,5 @@
+    This assumes the use of PostgreSQL as the main DB for OBP API. A minimal example script for MS SQL Server is included.
+
 # TLDR;
 
 # For read access to Users (e.g. Keycloak)

obp-api/src/main/scripts/sql/OIDC/cre_v_oidc_users_mssql.sql

@@ -0,0 +1,58 @@
+-- =============================================================================
+-- CREATE VIEW v_oidc_users (MS SQL Server Version)
+-- =============================================================================
+-- This script creates a read-only view exposing only necessary authuser fields for OIDC
+--
+-- PREREQUISITES:
+-- - Database must exist and you must be connected to it
+-- - Tables 'authuser' and 'resourceuser' must exist
+-- - User/Login for OIDC service must be created beforehand
+--
+-- TODO: Consider excluding locked users by joining with mappedbadloginattempt table
+--       and checking mbadattemptssinceresetorsuccess against max.bad.login.attempts prop
+--
+-- USAGE:
+-- 1. Connect to your target database
+-- 2. Run this script to create the view
+-- 3. Manually grant permissions: GRANT SELECT ON v_oidc_users TO [your_oidc_user];
+
+-- Drop the view if it already exists
+IF OBJECT_ID('dbo.v_oidc_users', 'V') IS NOT NULL
+    DROP VIEW dbo.v_oidc_users;
+GO
+
+-- Create a read-only view exposing only necessary authuser fields for OIDC
+CREATE VIEW dbo.v_oidc_users AS
+SELECT
+    ru.userid_ AS user_id,
+    au.username,
+    au.firstname,
+    au.lastname,
+    au.email,
+    au.validated,
+    au.provider,
+    au.password_pw,
+    au.password_slt,
+    au.createdat,
+    au.updatedat
+FROM dbo.authuser au
+INNER JOIN dbo.resourceuser ru ON au.user_c = ru.id
+WHERE au.validated = 1;  -- Only expose validated users to OIDC service (1 = true in MS SQL Server)
+GO
+
+-- Add extended property to the view for documentation
+EXEC sp_addextendedproperty
+    @name = N'MS_Description',
+    @value = N'Read-only view of authuser and resourceuser tables for OIDC service access. Only includes validated users and returns user_id from resourceuser.userid_. WARNING: Includes password hash and salt for OIDC credential verification - ensure secure access.',
+    @level0type = N'SCHEMA', @level0name = 'dbo',
+    @level1type = N'VIEW', @level1name = 'v_oidc_users';
+GO
+
+-- Grant SELECT permission on the OIDC view
+-- IMPORTANT: Replace 'oidc_user' with your actual OIDC database user/login name
+-- Uncomment and modify the following line:
+-- GRANT SELECT ON dbo.v_oidc_users TO [oidc_user];
+-- GO
+
+PRINT 'OIDC users view created successfully.';
+GO