public void startClient()
    {
        Login = Fname.getText().toString().trim();
        Password = Lpass.getText().toString().trim();
        //clients = dbh.getAllClients();

                if (Login.length() == 0) {
                    Toast.makeText(getApplicationContext(), "Enter Username", Toast.LENGTH_LONG).show();
                } else if (Password.length() == 0) {
                    Toast.makeText(getApplicationContext(), "Enter password", Toast.LENGTH_LONG).show();
                } else {
                    DBHelper db = new DBHelper(getApplicationContext());
                    //get data from database
                    final List<Client> user = db.getAllClients();
                    String username = Login;
                    String password = Password;
                    if (username.equals(user.get(0).getFirst()) && password.equals(user.get(0).getPassword())) {
                        Intent i = new Intent(getApplicationContext(), Client.class);
                        startActivity(i);
                    } else if (username.equals(user.get(0).getFirst()) && !password.equals(user.get(0).getPassword())) {
                        Password.equals("");
                        Toast.makeText(MainActivity.this, "Wrong Password", Toast.LENGTH_SHORT).show();
                    } else if (!username.equals(user.get(0).getFirst())) {
                        Toast.makeText(MainActivity.this, "Wrong Username", Toast.LENGTH_SHORT).show();

                    }
                }
    }