doc(dir): 📄 create sql users

services/Directory/CreateSqlUsers.md

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+# DirectoryMigrations user for applying EF Core migrations
+
+```sql
+USE [master];
+GO
+
+CREATE LOGIN DirectoryMigrations WITH PASSWORD = 'my_password';
+GO
+
+USE [directorydb];
+GO
+
+CREATE USER DirectoryMigrations FOR LOGIN DirectoryMigrations;
+ALTER ROLE db_ddladmin ADD MEMBER DirectoryMigrations; -- to apply migrations
+ALTER ROLE db_datareader ADD MEMBER DirectoryMigrations; -- to read from __EFMigrationsHistory
+ALTER ROLE db_datawriter ADD MEMBER DirectoryMigrations; -- to insert to __EFMigrationsHistory
+```
+
+# DirectoryApiReadonly for API runtime reads
+
+```sql
+USE [master];
+GO
+
+CREATE LOGIN DirectoryApiReadonly WITH PASSWORD = 'my_password';
+GO
+
+USE [directorydb];
+GO
+
+CREATE USER DirectoryApiReadonly FOR LOGIN DirectoryApiReadonly;
+ALTER ROLE db_datareader ADD MEMBER DirectoryApiReadonly; -- to read from __EFMigrationsHistory
+```