Like APIの追加

app/Like.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace App;
+
+use Illuminate\Database\Eloquent\Model;
+
+class Like extends Model
+{
+    protected $fillable = ['user_id', 'ejaculation_id'];
+
+    public function user()
+    {
+        return $this->belongsTo(User::class);
+    }
+
+    public function ejaculation()
+    {
+        return $this->belongsTo(Ejaculation::class)->withLikes();
+    }
+}