 I was trying to use AWS Aurora Serverless for MySQL in my project, but I am impossible to connect to it, though I have the endpoint, username, password.

What I have done:

1. From AWS console managment, I select RDS &gt; Instances &gt; Aurora &gt; Serverless 
2. Leave the default settings
3. Create database
4. AWS will only create an AWS Cluster
[![enter image description here][1]][1] 
5. I open MySQL Workbench, and use endpoint, username, password to connect the database

Ressult: 

&gt; Your connection attempt failed for user &#39;admin&#39; from your host to
&gt; server at xxxxx.cluster-abcdefg1234.eu-west-1.rds.amazonaws.com:3306: 
&gt; Can&#39;t connect to MySQL server on
&gt; &#39;xxxxx.cluster-abcdefg1234.eu-west-1.rds.amazonaws.com&#39; (60)


Did I make any wrong steps ? Please advice me.

****EDIT****

I tried to create another Aurora database with capacity type: Provisioned. I can connect to the endpoint seamlessly with username and password by MySql workbench. It means that the port 3306 is opened for workbench. 

About the security group: 
[![enter image description here][2]][2]


  [1]: https://i.stack.imgur.com/3SFuR.png
  [2]: https://i.stack.imgur.com/tQeSk.png

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AWS Aurora MySQL serverless: how to connect from MySQL Workbench