PDO Unknown database

Getting an error stating that the database is unknown for my user even though it exists and is spelled correctly. I have granted them all permissions on the db, I can access it through the mysql command line in my server and I can access it through mysql workbench but when trying to access it with pdo in my api.

I checked the User, Host from mysql.user and it shows that the user has % and localhost. I commented out bind-address in mysqld.cnf and created my user like so.

CREATE USER 'user'@'localhost' IDENTIFIED BY 'myPassword';
CREATE USER 'user'@'%' IDENTIFIED BY 'myPassword';
GRANT ALL PRIVILEGES ON *.* TO 'user'@'%' WITH GRANT OPTION;
FLUSH PRIVILEGES;

My PDO Connection

<?php
class Database{
    private $host = "127.0.0.1";
    private $db_name = "casinoCheckList";
    private $username = "user";
    private $password = "myPassword";
    public $conn;

    public function getConnection(){

        $this->conn = null;
        try{
            $this->conn = new PDO("mysql:host=" . $this->host . ";dbname=" . $this->db_name, $this->username, $this->password);
            $this->conn->exec("set names utf8");
        }catch(PDOException $exception){
            echo "Connection error: " . $exception->getMessage();
        }

        return $this->conn;
    }
}
?>