Undefined index, in laravel, i tried all the answers related to this but problem is not solved

i got error while login, the situation is that i'm creating a multi auth system in laravel, i have one user which is admin and one user which is subadmin, the admin login correctly but when i try to login subadmin it give an error "undefined index", i checked all the answers that are related to "undefined index" but my problem is not solved. i check the my form properly, i checked my login() method, i check the attempt() method but no positive result. please help me. thanks

login method

public function login(Request $request)
{
    // Validate the form data
    $this->validate($request, [   // $this is use to access the members of current cls.
        'email' => 'required|email',
        'password' => 'required'
    ]); 

    if(!Auth::guard('subadmin')->attempt(['status' => 1]))
    {
        session()->flash('status', 'Your account is not activated. Please contact to the main branch');
        return view('frontend.agent.showRegisteredMsg');

    } 

    //Attempt to log the user in
    if(Auth::guard('subadmin')->attempt(['email' => $request->email, 'password'=> $request->password], $request->remember))
    {
        return redirect()->intended(route('subadmin.dashboard'));
    }

    //if unsuccessfull
    return redirect()->back()->withInput($request->only('email', 'remember'));
}

login form

<form action="" method="post">
                        @csrf
                        <div class="form-group"> 
                            <label class="sr-only"></label>
                            <input class="form-control trans" type="email" placeholder="Email" name="email"> 


                            @if ($errors->has('email'))
                                <span class="invalid-feedback" role="alert">
                                    <strong></strong>
                                </span>
                            @endif
                        </div>
                        <div class="form-group">
                            <label class="sr-only"></label>
                            <input class="form-control trans" type="password" placeholder="Password" name="password">

                            @if ($errors->has('password'))
                                <span class="invalid-feedback" role="alert">
                                    <strong></strong>
                                </span>
                            @endif
                        </div>
                        <div class="checkbox text-left">
                            <label>
                                <input type="checkbox" name="remember">  Remember Password
                            </label>
                        </div>
                        <input type="submit" class="btn btn-block btn-primary" value="Login">

                        <div class="bg-light animation flipInX">
                            <a href="" style="color:red">Forgot Password?</a>
                        </div>
                    </form>

via Chebli Mohamed