Error: You must provide exactly one of DomainID or DomainName to authenticate by Username

[Nmishin]

Terraform and Cloudflare provider version
Terraform v1.0.4

mcs version "0.6.14"

Issue:

When I try to use env variables for configure openstack and mcs providers, I can't do plan and apply because of issue:

│ Error: You must provide exactly one of DomainID or DomainName to authenticate by Username
│ 
│   with provider["registry.terraform.io/mailrucloudsolutions/mcs"],
│   on versions.tf line 20, in provider "mcs":
│   20: provider "mcs" {}
│ 

How to fix:
unset OS_USER_DOMAIN_ID
and add

provider "openstack" {
  user_domain_id = "users"
}