Error (Retrying) Authentication failure. (18017) when trying to migrate emails from wormail to google

I'm trying to migrate mails from workmail to google worspace. Using IMAP imap.mail.us-east-1.awsapps.com Indicating source mail as name@mydomain.awsapps.com (mydomain.awsapps.com configured as default) And the password is working fine when logging to https://webmail.mail.us-east-1.awsapps.com/workmail/?organization=myorganisation

But from the google side I'm recevint the error Error (Retrying) Authentication failure. (18017)