/opt/nuget/credentialproviders/MyProvider Windows (Command Prompt)
C:\NuGet\CredentialProviders\MyProvider.exe Or on Linux: nuget_credentialproviders_path
set NUGET_CREDENTIALPROVIDERS_PATH=C:\NuGet\CredentialProviders nuget_credentialproviders_path
$env:NUGET_CREDENTIALPROVIDERS_PATH="C:\NuGet\CredentialProviders" nuget_credentialproviders_path