public function update(AuthorRequest $request, $id)
 {
     $authors = Authors::find($id);
     $image_name = $authors->photo;
     if ($request->hasFile('photo')) {
         $authors->photo = ClydeUpload::upload($request->file('photo'), $request->file('photo')->getClientOriginalName());
         ClydeUpload::exists($image_name) == true ? ClydeUpload::delete($image_name) : false;
     }
     $authors->name = $request->name;
     $authors->biography = $request->biography;
     $authors->update();
     return redirect()->route('admin.authors.index');
 }