現状

laravel初心者です。
自作で情報投稿サイトを作成しています。
投稿者の名前のみ表示させたいのですが、optional(Auth::user())->name、と記述しているせいか、全ての投稿がログイン中のユーザー名になってしまいます。
リレーションもしていて、user_idに紐ずく名前を表示させたいのですが、その方法が分かりません。
分かる方居ましたらお願い致します。

画面

DB

コード

php
@extends('layouts.app')

@section('content')
<!DOCTYPE html>
<html lang="ja"> 
<head> 
  <meta charset="UTF-8"> 
  <link rel="stylesheet" href="public/css/content.css">
</head> 
<body>
    <div class="container-fluid">
        <div class="row">
            <div class="col no-gutters">
               <img class="img-fluid" src="iStock-1163221036.jpg">
            </div>
        </div>
    </div>
    
    <div class="container">
        <div class="row justify-content-center">

            <div class="col-12">
                <div class="card-body">
                    @if (session('status'))
                        <div class="alert alert-success" role="alert">
                            {{ session('status') }}
                        </div>
                    @endif
                </div>
            </div>

            <div class="card" style="width: 35rem;">
                <div class="card text-center">
                    <div class="p-3">
                       
                        @foreach($contents as $content)

                        <h5 class="card-title"> {{ optional(Auth::user())->name }}</h5>

                        <div class="card-body">
                        <p class="card-text">店名</p>
                          <div class="form-group">
                            <textarea class="form-control" name="shop" rows="5">
                                {{ optional($content)->shop }}
                            </textarea>
                          </div>
                        </div>
ーー以下省略ーー

php
<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;

use App\Models\Sauna;
use App\Models\User;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Auth;

class SaunaController extends Controller
{
    /**
     * Display a listing of the resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function index()
    {
        $contents = DB::table('saunas')
        ->select('shop', 'hot', 'ice', 'chill', 'article', 'user_id')
        ->get();
        return view('saunas.sauna', compact('contents'));

    }

    /**
     * Show the form for creating a new resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function create()
    {
        return view('saunas.create');
    }

    /**
     * Store a newly created resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return \Illuminate\Http\Response
     */
    public function store(Request $request)
    {

        $sauna = new Sauna;

        $sauna->shop = $request->input('shop');
        $sauna->hot = $request->input('hot');
        $sauna->ice = $request->input('ice');
        $sauna->chill = $request->input('chill');
        $sauna->article = $request->input('article');
        $sauna->user_id = $request->user()->id;
       

        $sauna->save();

        return redirect('/home');

        // dd($shop, $sauna);
    }

    /**
     * Display the specified resource.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function show($id)
    {
        //
    }

    /**
     * Show the form for editing the specified resource.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function edit($id)
    {
        //
    }

    /**
     * Update the specified resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function update(Request $request, $id)
    {
        //
    }

    /**
     * Remove the specified resource from storage.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function destroy($id)
    {
        //
    }
}

php
<?php

namespace App\Models;

use Illuminate\Contracts\Auth\MustVerifyEmail;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Foundation\Auth\User as Authenticatable;
use Illuminate\Notifications\Notifiable;
use Laravel\Sanctum\HasApiTokens;

class User extends Authenticatable
{
    use HasApiTokens, HasFactory, Notifiable;

    /**
     * The attributes that are mass assignable.
     *
     * @var array<int, string>
     */
    
        public function saunas()
        {
            return $this->hasMany('App\Sauna');
        }
        

    protected $fillable = [
        'name',
        'sub_name',
        'lastname',
        'sub_lastname',
        'tel',
        'email',
        'password',
    ];
    
    /**
     * The attributes that should be hidden for serialization.
     *
     * @var array<int, string>
     */
    protected $hidden = [
        'password',
        'remember_token',
    ];

    /**
     * The attributes that should be cast.
     *
     * @var array<string, string>
     */
    protected $casts = [
        'email_verified_at' => 'datetime',
    ];
}

php
<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class Sauna extends Model
{
    
    public function user() {
        return $this->belongsTo('App\User');
    }




}