To work with a connector, it is required to generate the Key (API Key) and Secret in the personal account of the exchange and specify them at the connection settings.
It is worth paying attention that the Key and Secret are not the Login and Password. The Key and Secret are generated separately in your personal account. You do not need the Login and Password to work with the connector and you do not need to specify them anywhere.
And for S#.Data:
In the code, the Key and the Secret can be specified in the corresponding properties of the connector:
..... Trader.Key = Key.Text; Trader.Secret = Secret.Password; .....