How to get log in when having multiple email

Having same email id but password different

abc@xyz.com => 123456
abc@xyz.com =>  987654

I want to get logged in after match email and password

if (Auth::attempt($credentials, true)) {
    //Check first email and password if it does match return true else false
}

How could this possible to achieve, please guide and elobrate if possible thanks a ton in advance

You could start by retrieving all Users with the given email.

$users = User::where('email', $request->get('email'))->get();

$users->each(function (User $user) {
    if (\Hash::check($request->get('password'), $user->password)) {
        Auth::login($user);
    }
});

You then iterate over all the users and check the password yourself.