Fly will have already provisioned you with an account on the Support Hub and all that's left to do is set your password.
1. Click on Sign In and Reset Password
Visit the Support Hubs here
At the top right hand side of your screen, click 'Sign In' followed by 'Get A Password'
2. Access the password reset screen
You will be prompted to enter your email address. Ensure you are using the email address where your activation email was sent to.
3. Await the email and follow the prompts
You'll receive an email asking you to create a new password. The email will look like the screen below.
Click 'Create a new password' and follow the prompts to activate your account.
Upon creating your new password, you'll be logged in and taken to the Support Hub homepage.