1//add below code to fortify service provider boot function
2Fortify::authenticateUsing(function (LoginRequest $request) {
3 $user = User::where('user_name', $request->user_name);
4
5 if (
6 $user &&
7 Hash::check($request->password, $user->password)
8 ) {
9 return $user;
10 }
11 });
12//and change username in fortify config
13'username' => 'user_name',