Laravel 6.0.1 Custom Auth Guard - php

Question

I'm creating a custom login controller using a custom auth guard named 'students' but when logging in auth guard attempt always return false.
class login extends Controller
{
use AuthenticatesUsers;
public function index()
{
return view('voters.Auth.login');
}
public function checklogin(Request $request)
{
$this->validate($request, [
'votersid' => 'required',
'passcode' => 'required|alphaNum|min:3'
]);
$studentid = $request->get('votersid');
$pass = $request->get('passcode');
if (Auth::guard('student')->attempt(['Student_ID' => $studentid, 'passcode' => $pass])) {
return redirect('login/success');
}
return back()
->withInput($request->all())
->with('error', 'Please check your Student ID / Passcode.');
}
public function successlogin()
{
if (Auth::guard('student')->check()) {
return view('successlogin');
}
return redirect('/vote/login')
->with('error', 'Please Login first to authenticate.');
}
public function logout(Request $request)
{
Auth::logout();
$request->session()->invalidate();
return redirect('/');
}
}
The configuration is as follows
'guards' => [
'web' => [ 'driver' => 'session', 'provider' => 'users', ],
'student' => [ 'driver' => 'session', 'provider' => 'student', ],
'api' => [ 'driver' => 'token', 'provider' => 'users', 'hash' => false, ],
],
...
'providers' => [
'users' => [ 'driver' => 'eloquent', 'model' => App\User::class, ],
'student' => [ 'driver' => 'eloquent', 'model' => App\Student::class, ],
// 'users' => [ // 'driver' => 'database', // 'table' => 'users', // ], ],
Student Model
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Notifications\Notifiable;
use Illuminate\Foundation\Auth\User as Authenticatable;
class Student extends Authenticatable
{
use Notifiable;
/**
* The attributes that are mass assignable.
*
* #var array
*/
protected $fillable = [
'Student_ID', 'password', 'FirstName', 'LastName', 'MiddleName', 'GradeLvl',
];
/**
* The attributes that should be hidden for arrays.
*
* #var array
*/
protected $hidden = [
'password',
];
/**
* The attributes that should be cast to native types.
*
* #var array
*/
protected $casts = [
'email_verified_at' => 'datetime',
];
/**
* Send the password reset notification.
*
* #param string $token
* #return void
*/
public function sendPasswordResetNotification($token)
{
$this->notify(new ResetPassword($token));
}
/**
* Send the email verification notification.
*
* #return void
*/
public function sendEmailVerificationNotification()
{
$this->notify(new VerifyEmail);
}
/**
* Get the name of the unique identifier for the user.
*
* #return string
*/
public function getAuthIdentifierName()
{
// TODO: Implement getAuthIdentifierName() method.
}
/**
* Get the unique identifier for the user.
*
* #return mixed
*/
public function getAuthIdentifier()
{
// TODO: Implement getAuthIdentifier() method.
}
/**
* Get the password for the user.
*
* #return string
*/
public function getAuthPassword()
{
// TODO: Implement getAuthPassword() method.
}
/**
* Get the token value for the "remember me" session.
*
* #return string
*/
public function getRememberToken()
{
// TODO: Implement getRememberToken() method.
}
/**
* Set the token value for the "remember me" session.
*
* #param string $value
* #return void
*/
public function setRememberToken($value)
{
// TODO: Implement setRememberToken() method.
}
/**
* Get the column name for the "remember me" token.
*
* #return string
*/
public function getRememberTokenName()
{
// TODO: Implement getRememberTokenName() method.
}
}
expecting to login using the custom auth guard but when i entered then correct credential the guard always return false instead of true or login successfully.