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ASP.NET Core
ASP.NET Core is a cross-platform .NET framework for building modern cloud-based web applications on Windows, Mac, or Linux.
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Nucleus
Vue startup application template that uses ASP.NET Core API layered architecture at the back-end and JWT based authentication (by alirizaadiyahsi)
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
This is very easily done with asp.net identity. In fact the default templates will generate a solution with it added so you can see an example of how it is done.
I don't know why they write it that way. For tokens, you can use https://www.nuget.org/packages/Microsoft.AspNetCore.Authentication.JwtBearer. The other things you listed are basically built in.