Fix possible null exception in login by using GetValueOrDefault

Replaced userId.Value with userId.GetValueOrDefault() in OnUserLoggingInAsync call to prevent potential exceptions when userId is null. This change improves code safety without altering existing logic.

Author: Vadim Belov

Sources/EasyExtensions.AspNetCore.Authorization/Controllers/BaseAuthController.cs

@@ -153,7 +153,7 @@ public async Task<IActionResult> Login([FromBody] LoginRequestDto request)
             Guid? userId = await FindUserByUsernameAsync(request.Username);
             if (!userId.HasValue || userId == Guid.Empty)
             {
-                await OnUserLoggingInAsync(userId.Value, AuthType.Credentials, AuthRejectionType.UserNotFound);
+                await OnUserLoggingInAsync(userId.GetValueOrDefault(), AuthType.Credentials, AuthRejectionType.UserNotFound);
                 return this.ApiUnauthorized("Invalid username or password");
             }
             bool canLogin = await CanUserLoginAsync(userId.Value);