BistroDriveWebApp.Models.UserRepository.GenerateToken C# (CSharp) Method

        public usertoken GenerateToken(string id_user)
        {
            var rtoken = Security.GetMd5(id_user + DateTime.Now.ToFileTimeUtc());
            var token = new usertoken
            {
                Id_User = id_user,
                Expiration = DateTime.Now.AddDays(30),
                Token = rtoken
            };
            context.usertokens.Add(token);
            context.SaveChanges();
            return token;
        }