Your gateway activation key. You can obtain the activation key by sending an HTTP GET request with redirects enabled to the gateway IP
            address (port 80). The redirect URL returned in the response provides you the activation key for your gateway in the query string parameter
            activationKey. It may also include other activation-related parameters, however, these are merely defaults -- the arguments you pass
            to the ActivateGateway API call determine the actual configuration of your gateway.
             
            
Constraints:
 Declaration Syntax
 Declaration Syntax| C# | 
public string ActivationKey { get; set; }