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