add checkin_webhooks table

app/CheckinWebhook.php

@@ -0,0 +1,28 @@
+<?php
+
+namespace App;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Support\Str;
+
+class CheckinWebhook extends Model
+{
+    public $incrementing = false;
+    protected $keyType = 'string';
+
+    protected $fillable = ['name'];
+
+    protected static function boot()
+    {
+        parent::boot();
+
+        self::creating(function (CheckinWebhook $webhook) {
+            $webhook->id = Str::random(64);
+        });
+    }
+
+    public function user()
+    {
+        return $this->belongsTo(User::class);
+    }
+}