使用mysql workbench单击后无法连接到heroku数据库

Created a heroku database using clearDB:Ignite, Dumped an sql file to clearDB using mySQL-workbench but unable to connect to the database.

I haven't tried connecting to heroku before but connecting to localhost has worked using the code snippet.

try{
 $pdo = new PDO('mysql:host = us-cdbr-***********.net;port=3306;dbname = ************','b3*********','***********');
 $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
}

Expecting to connect to the database but it gives the following Connection failed: SQLSTATE[HY000] [1045] Access denied for user 'b3*********'@'localhost' I'm sure that all the heroku credentials I've entered are correct