PluralKit/nuget.config

<configuration>
    <packageSources>
        <add key="nuget.org" value="https://api.nuget.org/v3/index.json" protocolVersion="3" />
        <add key="SlimGet" value="https://nuget.emzi0767.com/api/v3/index.json" protocolVersion="3" />
    </packageSources>
</configuration>