Begin an async connection to a MySQL instance
public static function connectWithOpts( string $host, int $port, string $dbname, string $user, string $password, AsyncMysqlConnectionOptions $conn_opts, ): Awaitable<AsyncMysqlConnection>;
Use this to asynchronously connect to a MySQL instance.
Normally you would use this to make one asynchronous connection to the MySQL client.
If you want to be able to pool up a bunch of connections, you would call
setPoolsConnectionLimit(), create a default pool of connections with
AsyncMysqlConnectionPool()::__construct(), which now
has that limit set, and then call
string $host- The hostname to connect to.
int $port- The port to connect to.
string $dbname- The initial database to use when connecting.
string $user- The user to connect as.
string $password- The password to connect with.