Enter your details using your JOURNEYONE email as 'Business Email'
As JourneyOne is a registered partner, it should be able to verify this email
Complete the rest of the fields, with your 'training and certification' (I think that is what it was called) email as your PERSONAL email used in the 'scheduling the exam step'
Once your account is completed, navigate to 'My Profile' (top right), and then 'My AWS Certifications' to check your account was correctly linked