maximum number of concurrent request?

I wrote custom the middleware to implement custom authorization in asp.net core. It works normally but if it put my app on load test and make 1000 request in 10 seconds(etc)

I am getting empty httpContext @ invoke in the middleware. Is this mean there is limitation on how people can make request within certain time? 

In side of Configure function this is what i specified for the middle ware.

app.UseStaticFiles();
app.UseAuthentication();
app.UseRewritePath();