Cut down version of a Azure Functions HTTP trigger

sampleFunctions.cs

namespace EventMgr.Functions.Events
{
    [DependencyInjectionConfig(typeof(DIConfig))]
    public static class Attendee
    {
        [FunctionName("Attendee")]
        public static async Task<IActionResult> Run(
            [HttpTrigger(AuthorizationLevel.Anonymous, "get", "post", "put", "delete", Route = "attendee")]
            HttpRequest request, ILogger log, ExecutionContext context,
            [Inject] IAttendeeRepository attendeeRepository,
            [Inject] IExceptionReporting exceptionReporting,
            [Inject] IManagementApiClient mgmtApiClient)
        {
            try
            {
                log.LogInformation("{FunctionName} starting", context.FunctionName);

                // Azure Functions v2, as of tis writing, doesn't have proper dependency 
                // injection. I'm using a library that allows me to use Autofac but the 
                // request, log and context don't get injected :( Hence this new instance below
                // Also mgmtApiClient is from the Auth0 SDK. Used to access authentication data
                var headerValidation = new Auth0Helper(request, log, exceptionReporting, mgmtApiClient);
                var errorResult = await headerValidation.ValidateHeaderAndAuthLevel(RoleTypes.Admin, request.Method);
                if (errorResult != null)
                {
                    log.LogWarning("{FunctionName} returning an error", context.FunctionName);
                    return errorResult;
                }

                // Do stuff here...
            }
            catch (Exception ex)
            {
                log.LogError("{FunctionName} exception thrown", ex, context.FunctionName);
                await exceptionReporting.LogException(ex);
                return new InternalServerErrorResult();
            }
        }
    }
}