add checkin_webhooks table

database/migrations/2020_07_19_173931_create_checkin_webhooks_table.php

@@ -0,0 +1,37 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class CreateCheckinWebhooksTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('checkin_webhooks', function (Blueprint $table) {
+            $table->string('id', 64);
+            $table->integer('user_id')->nullable();
+            $table->string('name');
+            $table->timestamps();
+
+            $table->primary('id');
+
+            $table->foreign('user_id')->references('id')->on('users')->onDelete('set null');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('checkin_webhooks');
+    }
+}