public string logout(string userData, string filesData)
{
User user = JsonConvert.DeserializeObject <User>(userData);
if (!theDal.isValid(user))
{
return("User credentials are not valid.");
}
List <File> list = JsonConvert.DeserializeObject <List <File> >(filesData);
foreach (var file in list)
{
if (theDal.contain(user, file))
{
theDal.removeFile(file, user.name);
}
}
theDal.logout(user);
return("User logout.");
}