/// <summary>
/// Use saved credentials if omitted.
/// </summary>
/// <param name="credentialRepository">
/// A <see cref="ICredentialRepository"/> to load saved credentials from.
/// </param>
/// <param name="server">
/// The server name. This cannot be null, empty or whitespace.
/// </param>
/// <param name="suppliedUserName">
/// The user name given on the command line. Use the stored one if null.
/// </param>
/// <param name="suppliedPassword">
/// The password given on the command line. Use the stored one if null.
/// </param>
/// <param name="userName">
/// Receives the user name.
/// </param>
/// <param name="password">
/// Received the password.
/// </param>
/// <exception cref="ArgumentException">
/// <paramref name="server"/> cannot be null, empty or whitespace.
/// </exception>
/// <exception cref="CredentialNotFoundException">
/// No credentials are specified or saved for that server.
/// </exception>
private static void GetCredentials(ICredentialRepository credentialRepository,
string server, string suppliedUserName, string suppliedPassword,
out string userName, out string password)
{
if (string.IsNullOrWhiteSpace(suppliedUserName) || string.IsNullOrWhiteSpace(suppliedPassword))
{
credentialRepository.Load(server, out userName, out password);
}
else
{
userName = suppliedUserName;
password = suppliedPassword;
}
}
