Hi @vikasjklalwani,
Welcome to the Auth0 Community!
It doesn’t look like there is a direct integration from that example, (it looks like you wrote it, great work!), but it is quite similar and should be possible to translate some of the general concepts.
Our Auth0 ASP.NET (OWIN) SDK Quickstarts: Login example uses similar libraries, although it doesn’t use the resource owner password grant, although it is available.
Hopefully that helps!