bitwarden/src/Api/Utilities/SecretsManagerAttribute.cs

using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.Filters;

namespace Bit.Api.Utilities
{

    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Method)]
    public class SecretsManagerAttribute : Attribute, IResourceFilter
    {
        public void OnResourceExecuting(ResourceExecutingContext context)
        {
            var env = context.HttpContext.RequestServices.GetService<IHostEnvironment>();
            if (!env.IsDevelopment())
            {
                context.Result = new NotFoundResult();
            }
        }

        public void OnResourceExecuted(ResourceExecutedContext context) { }
    }
}