Setup db automation

Database/Core/UserService.cs

@@ -0,0 +1,76 @@
+using Core.Entities.Users;
+using Insight.Database;
+using System.Data;
+
+namespace Database.IdentitySystem
+{
+    public class UserService
+    {
+        private readonly IDbConnection _db;
+
+        public UserService(IDbConnection db)
+        {
+            _db = db;
+        }
+
+        public async Task CreateUserWithTenant(string email, string password, string tenantConnectionString)
+        {
+            var schema = "dev";
+
+            if (_db.State != ConnectionState.Open)
+                _db.Open();
+
+            using var transaction = _db.BeginTransaction();
+            try
+            {
+                // Create user
+                var user = new User
+                {
+                    Email = email,
+                    PasswordHash = PasswordHasher.HashPassword(password),
+                    SecurityStamp = Guid.NewGuid().ToString(),
+                    EmailConfirmed = false,
+                    CreatedDate = DateTime.UtcNow
+                };
+
+                var userId = await _db.ExecuteScalarAsync<int>(@$"
+                INSERT INTO {schema}.users (email, password_hash, security_stamp, email_confirmed, created_date)
+                VALUES (@Email, @PasswordHash, @SecurityStamp, @EmailConfirmed, @CreatedDate)
+                RETURNING id", user);
+
+                // Create tenant
+                var tenant = new Tenant
+                {
+                    ConnectionString = tenantConnectionString,
+                    CreatedDate = DateTime.UtcNow,
+                    CreatedBy = userId,
+                    IsActive = true
+                };
+
+                var tenantId = await _db.ExecuteScalarAsync<int>(@$"
+                INSERT INTO {schema}.tenants (connection_string, created_date, created_by, is_active)
+                VALUES (@ConnectionString, @CreatedDate, @CreatedBy, @IsActive)
+                RETURNING id", tenant);
+
+                // Link user to tenant
+                var userTenant = new UserTenant
+                {
+                    UserId = userId,
+                    TenantId = tenantId,
+                    CreatedDate = DateTime.UtcNow
+                };
+
+                await _db.ExecuteAsync(@$"
+                INSERT INTO {schema}.user_tenants (user_id, tenant_id, created_date)
+                VALUES (@UserId, @TenantId, @CreatedDate)", userTenant);
+
+                transaction.Commit();
+            }
+            catch
+            {
+                transaction.Rollback();
+                throw;
+            }
+        }
+    }
+}