fix: [sftp] remove any ``authorized_keys`` that was previously left.

sftp/hooks/init

@@ -20,9 +20,12 @@ users_def=$(echo "$service_def" | shyaml get-value options.users 2>/dev/null) ||
 users_file="$SERVICE_CONFIGSTORE/etc/sftp-users.conf"
 echo | file_put "$users_file"
 
+rm -f "$SERVICE_DATASTORE/home/"*"/.ssh/authorized_keys"
+
 [ "$users_def" ] || exit 0
 
 rm -f "$users_file"
+
 volume_keys=()
 while read-0 login user_def; do
     key_nb=0
@@ -57,3 +60,4 @@ $(for volume in "${volume_keys[@]}"; do
       echo "    - $volume"
   done)
 "
+