Laravel Update User Password From Form With Hash

So I have this form with 3 fields (User Email, Password and Password Confirm). this form posts to a route that takes me to the following controller:

public function updateUser($id, Request $request){

    //validate post data
    $this->validate($request, [
        'email' => 'required|email',
        'password' => 'required|confirmed|min:6',
    ]);

    $request->all();

    $request['email'] = $request['email'];
    $request['password'] = Hash::make($request['password']);


    $postData =  [$request['email'], $request['password']];

    User::find($id)->update($postData);

    //store status message
    Session::flash('success_msg', 'User details updated successfully!');

    return redirect()->route('admin.user');

}

The problem is, this code is not updating my database at all although it gives me no errors.

Basically what I am trying to do is that I want to allow the administrator to change the default account details within the admin panel. The default admin details are created by a seeder once the app is installed. (This app is single user - only the admin)

Thank you all!

You have to pass key of array so that column can be identify.

public function updateUser($id, Request $request){
    //validate post data
    $this->validate($request, [
        'email' => 'required|email',
        'password' => 'required|confirmed|min:6',
    ]);
    $userData = $request->only(["email","password"]);
    $userData['password'] = Hash::make($userData['password']);
    User::find($id)->update($userData);
    Session::flash('success_msg', 'User details updated successfully!');
    return redirect()->route('admin.user');
}