Foreign Key in Seeders

Need Help
1

I have a problem with the foreign key to generate random data, I already overflowed the documentation of the Seeders but there is no relationship with the foreign keys, I hope your help, thanks.

public function getDependencies(){
        return UsersTable::class;
}
public function run()
    {
        $faker = Faker\Factory::create();
        $data = [];
        $foreignKeys = $this->getDependencies()->fetchAll(['id']);

        for ($i=0; $i < 200 ; $i++) { 
            $data[] = [
                'title' => $faker->name(),
                'description' => $faker->text(),
                'url' => $faker->url(),
                'created' => date("Y-m-d H:i:s"),
                'modified' => date("Y-m-d H:i:s"),
                'user_id' => $foreignKeys[array_rand($foreignKeys)]
            ];
        }
        $table = $this->table('bookmarks');
        $table->insert($data)->save();
    }
2

^^ You can try:

...  
'user_id' => $faker->randomElement($foreignKeys);
...