For developers: Create an exchange rate settings class
The settings class for your custom exchange rate provider implements the Telerik.Sitefinity.Modules.Ecommerce.ExchangeRates.Model.IExchangeRateSettings interface. It must expose properties for the following values:
    - Username
 
    - Password
 
    - Url
 
    - Timeout
 
These values can be used when you make an external call to a service in order to get the exchange rate for a specific currency.
To create a settings class you must perform the following:
    - Create a new class file.
    In the folder for your custom provider, create a new class file. 
    - Make the class public.
    Define the class to use the public access specifier.  
    - Implement the IExchangeRateSettings interface.
    The IExchangeRateSettings interface requires the following properties: 
    
        - string UserName
 
        - string Password
 
        - string Url
 
        - int Timeout
 
    
    - Create constructors.
    Create one empty constructor and one that accepts the URL and timeout values as arguments. 
Use the following code sample for the exchange rate settings class: