OpenIntegrations/docs/en/examples/Dropbox/UpdateToken.txt

    AppKey       = FunctionParameters["Dropbox_Appkey"];
    AppSecret    = FunctionParameters["Dropbox_Appsecret"];
    RefreshToken = FunctionParameters["Dropbox_Refresh"];

    Result = OPI_Dropbox.RefreshToken(AppKey, AppSecret, RefreshToken);