Refactor UserAccount repository methods and add stored procedures for user account management

WebAPI/Program.cs

@@ -1,3 +1,33 @@
+// Load a local .env file into environment variables when present (useful for local development)
+try
+{
+    var envPath = Path.Combine(Directory.GetCurrentDirectory(), ".env");
+    if (File.Exists(envPath))
+    {
+        foreach (var line in File.ReadAllLines(envPath))
+        {
+            var trimmed = line.Trim();
+            if (string.IsNullOrEmpty(trimmed) || trimmed.StartsWith("#"))
+                continue;
+            var idx = trimmed.IndexOf('=');
+            if (idx <= 0)
+                continue;
+            var key = trimmed.Substring(0, idx).Trim();
+            var val = trimmed.Substring(idx + 1).Trim();
+            if (val.Length >= 2 && ((val.StartsWith("\"") && val.EndsWith("\"")) || (val.StartsWith("'") && val.EndsWith("'"))))
+            {
+                val = val.Substring(1, val.Length - 2);
+            }
+            if (Environment.GetEnvironmentVariable(key) == null)
+                Environment.SetEnvironmentVariable(key, val);
+        }
+    }
+}
+catch
+{
+    // If dotenv loading fails, continue without blocking startup.
+}
+
 var builder = WebApplication.CreateBuilder(args);
 
 // Add services to the container.