is it possible to define a custome endpoint ? my .aws/config si:

[plugins]
endpoint = awscli_plugin_endpoint

[default]
region = gra

s3 =
  endpoint_url = <https://s3.gra.io.cloud.ovh.net>
  signature_version = s3v4
s3api =
  endpoint_url = <https://s3.gra.io.cloud.ovh.net>