public function postSignup(Request $request)
{
$this->validate($request, ['email' => 'required|unique:users|email|max:255', 'username' => 'required|unique:users|alpha_dash|max:20', 'password' => 'required|min:6|max:20']);
User::create(['email' => $request->input('email'), 'username' => $request->input('username'), 'password' => bcrypt($request->input('password'))]);
return redirect()->route('home')->with('info', 'Your account has been created and you can now sign in.');
}