Typical problems with signing in to the Aqua include the following.
Invalid Email Address
If your email address is not recognized when you attempt to sign in, it may be due to the following reasons.
A Different Email Address Used To Create The Account
Verify that the email address that you are using to create the account is the same one that you are using to sign in. One way to verify this is by finding the most recent email that you have received from the system. If you have recently signed up for Aqua this may be an email with a hyper link for you to verify your email address.