public async Task TestLogout()
{
FMS18 fms2 = new FMS18(address, user, pw);
fms2.SetFile(file);
var token2 = await fms2.Authenticate();
int result = await fms2.Logout();
Assert.Equal(0, result);
}
internal async void Logout()
{
int result = await fms.Logout();
token = string.Empty;
}