Key 

Namespace: SynicSugar.MatchMake
Class: AttributeData

public string Key

Description 

The Key for this attribute.

using SynicSugar.MatchMake;

public class LobbyCondition : MonoBehaviour {
    void SetLobbyConditions(){
        AttributeData attribute = new AttributeData();
        attribute.Key = "Level";
    }
}