You will be asked to enter the password that was used to encrypt the Aegis vault. The same password will be used for resulting KDBX database.
Limitations
This tool does not support changing existing databases, atk creates a separate clean database for your TOTP codes. You should not store TOTP secrets in the same database as your passwords anyway, since this removes all the benifits of having a second factor in the first place.
This tool also does not accept unencrypted Aegis JSON files (yet, at least) as input
Fork
Differences
Exports to the original KeePass 2 for Windows TOTP implementation
Stores the TOTP code in the Password field
Enables Autotyping
Has updated dependencies
This fork aims to be compatible with the original TOTP implementation (KeepasXC etc.)