I have a free account on AWS. I’ve set up a mysql database and an EC2 instance. I would like to connect to the database from a shell in the EC2. When I try to do so with this command:

 mysql -h database-1.clyum4kwu2lg.us-west-2.rds.amazonaws.com -u {username} -p

I get

Can't connect to MySQL server on 'database-1.clyum4kwu2lg.us-west-2.rds.amazonaws.com:3306' (110)

Theyr’e both in the same security group. I have the following inbound rules on the group:
sgr-039fbbc8ad9003041 IPv4 SSH TCP 22 71.38.46.66/32 –
–

sgr-0eff695cc6b9c637c   IPv4    MYSQL/Aurora    TCP 3306    71.38.46.66/32  –
–
sgr-04d152a98c8ec2356   IPv4    Custom TCP  TCP 8080    0.0.0.0/0

and the following outbound rules:

–
sgr-0a1b7e4aebd28bedd IPv4 All traffic All All 0.0.0.0/0

how do I enable connection from the EC2 to the database?