Step 1 – Create API Token
https://manager.infomaniak.com/v3/78278/api/dashboard
Token: 6zs-YV2Gp3Tbatzl2FHq5JsjTmizT7mJkA8RTh7BYdTBGnfUJClDOV3FDs733mwkEK6penUdJ4S6G7oS
2 - Create/renew certificate
export INFOMANIAK_API_TOKEN=6zs-YV2Gp3Tbatzl2FHq5JsjTmizT7mJkA8RTh7BYdTBGnfUJClDOV3FDs733mwkEK6penUdJ4S6G7oS
certbot certonly --authenticator certbot-dns-infomaniak:dns-infomaniak --server https://acme-v02.api.letsencrypt.org/directory --agree-tos --rsa-key-size 4096 --email info@bienvu.ch -d "hosting.bienvu.ch" -d "*.hosting.bienvu.ch"
Check also
https://github.com/Infomaniak/certbot-dns-infomaniak