Comment on Implement a SFTP Service for Ubuntu/Debian With a Chroot’ed, Isolated File Directory. by Frédéric Champreux (@OpenDataQuality)

Thanks Ben, great demonstration.
I had 1 issue to solve : I initially configured SSH to allow connections from identified clients only, using a public Key. Then I set: PasswordAuthentication no
As a consequence, SSH client could log in automatically, but SFTP client could not log in.
Is there a way to require that SFTP also logs in using the client’s public key ?
Thanks,
Fred