Message sending through session isn't showing - laravel

Question

In my laravel-7 application I am sending custom message for invalid login in blade through controller. but message is not showing in blade. also tail me if I am doing anything wrong.
in blade
<div class="card-body">
#if(session()->has('message'))
<div class="alert alert-{{session('type')}}">
<li>{{session('message')}}</li>
</div>
#endif
<form action="{{route('login')}}" method="post" class="form">
#csrf
<div class="form-group">
<label for="email">Email address</label>
<input type="email" name="email" class="form-control" id="email" placeholder="Enter email" value="{{old('email')}}">
</div>
<div class="form-group">
<label for="password">Password</label>
<input type="password" name="password" class="form-control" id="password" placeholder="Password">
</div>
<div class="form-group">
<button type="submit" class="btn btn-primary btn-block">Login</button>
</div>
</form>
in auth controller
public function processlogin(Request $request)
{
$this->validate($request,[
'email'=>'required|email',
'password'=>'required|min:6',
]);
$credentials=$request->except(['_token']);
if (Auth::attempt($credentials)){
return redirect()->route('index');
}
$this->setErrorMessage('Invalid Credentials.');
return redirect()->back();
}
in controller
public function setErrorMessage($message):void
{
session()->flash($message);
session()->flash('type','danger');
}

Answer 1

You are not naming the flashed variable message. You are passing the value of $message as the first argument to flash which is the name of the key.
session()->flash('message', $message);