public function update(Request $request, $id)
    {
      $user = User::findOrFail($id); //Get role specified by id

  //Validate name, email and password fields
      $this->validate($request, [
          'name'=>'required|max:120',
          'username'=>'required|max:120',
          'email'=>'required|email|unique:users,email,'.$id,
          'password' => 'nullable|string|min:6|confirmed'
      ]);
      $input = $request->only(['name', 'username', 'email']); //Retreive the name, email and password fields
      if (trim(Input::get('password')) != '') {
        $user->password = Hash::make(trim(Input::get('password')));
      }

      $user->fill($input)->save();
      return view('users.profile')
          ->with('flash_message',
           'Your Profile successfully edited.');
    }