Serilog: Add Context using ILogEventEnricher implementations

LogEventEnricher.cs

public class UserLogEventEnricher : ILogEventEnricher
{
    private readonly IUser _user;

    public UserLogEventEnricher(IUser user)
    {
        _user = user;
    }

    public void Enrich(LogEvent logEvent, ILogEventPropertyFactory propertyFactory)
    {
        logEvent.AddPropertyIfAbsent(propertyFactory.CreateProperty("Username", _user.Username));
        logEvent.AddPropertyIfAbsent(propertyFactory.CreateProperty("ComputerName", _user.Lab));
    }
}