/// <summary>
/// Sets the user's identity (ie. email address, username, user id) that the event happened to.
/// </summary>
/// <param name="builder">The log builder object.</param>
/// <param name="identity">The user's identity that the event happened to.</param>
public static ILogBuilder Identity(this ILogBuilder builder, string identity)
{
return(builder.Identity(identity, null));
}