Authenticates a Customer using a username and password, and returns its unique identifier on success.
| Method | /sites/{company-id}/ws/soap_v1.svc/AuthenticateCustomer | 
The request body is of type AuthenticateCustomer.
| Name | Description | Data Type | 
|---|---|---|
| userName | xml:string | |
| password | xml:string | 
|  | 
The response body is of type AuthenticateCustomerResponse.
| Name | Description | Data Type | 
|---|---|---|
| AuthenticateCustomerResult | guid | 
|  | 
 |