I am facing this issue while using default Authentication feature, I need to change user_login and user_pass fields that are in db ( i can't change them because my WordPress blog is already working on it and I am developing this app to support it), My AuthController is contains code like as under;

protected $username = 'user_login';
public function __construct()
{
$this->middleware('guest', ['except' => 'getLogout']);
}
protected function validator(array $data)
{
return Validator::make($data, [
'user_login' => 'required|max:255',
'user_pass' => 'required|confirmed|min:6',
]);

same user_login and user_pass are coming from my Login View and on post in using Auth\Login.

Further, I have changed some of the code as under in AuthenticatesUsers, under public function postLogin(Request $request)

$this->validate($request, [
    $this->loginUsername() => 'required', 'user_pass' => 'required',
]);

and I also have change something under this section ;

protected function getCredentials(Request $request)
{
return $request->only($this->loginUsername(), 'user_pass');
}

Now, I believe my password in DB is MD5 , its 32 chars long, I am getting this error message when I tried to login <b>"These credentials do not match our records."</b>

I have also tried this in my User Model,

public function setPasswordAttribute($password) {
return $this->attributes['user_pass'] = bcrypt($password);
//return $this->attributes['user_pass'] = md5($password); 
}

Please guide or help, thanks in advance