How it works
By default all public properties on an object are included when indexing it. The simplest way to exclude a property is to annotate it with the JsonIgnore attribute (found in the Newtonsoft.Json namespace).
Example
C#
using Newtonsoft.Json;
public class User
{
    public string Username { get; set; }
    [JsonIgnore]
    public string Password { get; set; }
}
 
 
You also can exclude properties, or other previously included fields, by customizing the Client conventions.
C#
//using EPiServer.Find.ClientConventions;
client.Conventions
    .ForInstancesOf<User>()
        .ExcludeField(x => x.Password);
 
 
The above code excludes the Password property from instances of the User class as well as instances of classes that inherit the User class.