custom Authentication on Laravel - php

Question

I want to write a custom authentication on laravel, I want to know should I use default auth or should I write a new?
my auth workflow is:
Step 1- Show email form (in this step we will get just email address)
Step 1-2- check for email existence and if email exists we will go to Step 2 and if not exists I should redirect user to Step 3
Step 2- get the user password (validate password and if everything was OK user will login)
Step 3- show registration form and fill the email with entered user email address (validate form and register user)
What is your solution ?

Answer 1

//Login rules
public function user_login_rules(array $data)
{
$messages = [
'email.required' => 'Please enter your email'
];
$validator = Validator::make($data, [
'email' => 'required'
], $messages);
return $validator;
}
Your post method
public function postSignIn(Request $request)
{
$request_data = $request->all();
$validator = $this->user_login_rules($request_data);
if($validator->fails())
{
return redirect()->back()->withErrors($validator)->withInput();
}
else
{
$email = $request_data['email'];
$user_details = User::where('email', $email)->first();
if(count($user_details) > 0)
{
$credentials = array('email'=> $email ,'password'=> $request_data['password']);
if ($this->auth->attempt($credentials, $request->has('remember')))
{
//Login successful
return redirect()->to('/home');
}
else
{
$error = array('password' => 'Please enter a correct password');
return redirect()->back()->withErrors($error);
}
}
else
{
//Display register page with email
return view('register')->with('email', $email);
}
}
}