Problème automatisation SnapShoot

Bonjour,

Je suis ce tutoriel https://www.cloudvps.com/blog/automatic-backup-snapshots-openstack afin d'automatiser mes Snapshoot.

Cependant lorsque je tape "nova credentials" j'ai cette erreur qui apparait :
ERROR (ClientException): Unknown Error (HTTP 300)

Du coup je peux pas automatiser la suite avec le script pour le lancer en cron.
Le contenu du document /root/.openstack_snapshotrc :
#!/usr/bin/env bash
# To use an OpenStack cloud you need to authenticate against the Identity
# service named keystone, which returns a **Token** and **Service Catalog**.
# The catalog contains the endpoints for all services the user/tenant has
# access to - such as Compute, Image Service, Identity, Object Storage, Block
# Storage, and Networking (code-named nova, glance, keystone, swift,
# cinder, and neutron).
#
# *NOTE*: Using the 2.0 *Identity API* does not necessarily mean any other
# OpenStack API is version 2.0. For example, your cloud provider may implement
# Image API v1.1, Block Storage API v2, and Compute API v2.0. OS_AUTH_URL is
# only for the Identity API served through keystone.
export OS_AUTH_URL=https://auth.cloud.ovh.net/
# With the addition of Keystone we have standardized on the term **tenant**
# as the entity that owns the resources.
export OS_TENANT_ID=ID du projet (mis par défaut par OVH)
export OS_TENANT_NAME=Nom du projet (mis par défaut par OVH)
# unsetting v3 items in case set
unset OS_PROJECT_ID
unset OS_PROJECT_NAME
unset OS_USER_DOMAIN_NAME
unset OS_INTERFACE
# In addition to the owning entity (tenant), OpenStack stores the entity
# performing the action as the **user**.
export OS_USERNAME="j'ai mis le nom d'utilisateur"
# With Keystone you pass the keystone password.
echo "Please enter your OpenStack Password for project $OS_TENANT_NAME as user $OS_USERNAME: "
read -sr OS_PASSWORD_INPUT
export OS_PASSWORD="j'ai remplacé la variable par mon mot de passe"
# If your configuration has multiple regions, we set that information here.
# OS_REGION_NAME is optional and only valid in certain environments.
export OS_REGION_NAME="GRA3"
# Don't leave a blank variable, unset it if it was empty
if [ -z "$OS_REGION_NAME" ]; then unset OS_REGION_NAME; fi
export OS_ENDPOINT_TYPE=publicURL
export OS_IDENTITY_API_VERSION=2

Merci de votre aide :)
Noé