restore composer.json, add mysqli extension

app/Models/Firebase.php

@@ -0,0 +1,39 @@
+<?php
+
+namespace App\Models;
+
+use App\Models\User;
+use Illuminate\Database\Eloquent\Model;
+
+/**
+ * @package App\Models
+ * @property int $id
+ * @property int|null $user_id
+ * @property string $token
+ * @property string $device_id
+ * @property string $device_name
+ * @property string $device_type
+ *
+ * @property-read User $user
+ */
+class Firebase extends Model
+{
+    public $timestamps = false;
+
+    protected $fillable = [
+        'user_id', 'token', 'device_id', 'device_name', 'device_type'
+    ];
+
+    protected $casts = [
+        'user_id' => 'integer',
+        'token' => 'string'
+    ];
+
+    /**
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     */
+    public function user()
+    {
+        return $this->belongsTo(User::class);
+    }
+}