Enum describing possible customer match upload key types.
| Enums | |
|---|---|
| 
 | Not specified. | 
| 
 | Used for return value only. Represents value unknown in this version. | 
| 
 | Members are matched from customer info such as email address, phone number or physical address. | 
| 
 | Members are matched from a user id generated and assigned by the advertiser. | 
| 
 | Members are matched from mobile advertising ids. |