This is a API written in C# but it can be used in any .NET language. It's a fork from WhatsAPINet, which is based on WhatsAPI. The goal of this fork is to make it all work again and refacter the code, add documentation and write documentation on how Whatsapp works.
Install-Package WhatsAppAPI -Version 15.4.29
dotnet add package WhatsAppAPI --version 15.4.29
<PackageReference Include="WhatsAppAPI" Version="15.4.29" />
paket add WhatsAppAPI --version 15.4.29
Fixes the bug of "not-authorized" login.
This package has no dependencies.