Network instructions seem to be outdated

[fvlasie]

https://www.rdoproject.org/networking/neutron-with-existing-external-network/

The instructions on this page seem to be out-of-date. I get deprecation warnings and after the section.
8<-----8<----

Now, let's switch to the newly created user:

# export OS_USERNAME=internal
# export OS_TENANT_NAME=internal
# export OS_PASSWORD=foo

Then create a router and set its gateway using the external network created by the admin in one of previous steps:

# neutron router-create router1

8<-----8<----

I get errors and I cannot continue:

[root@soso ~(keystone_admin)]# neutron router-create router1
neutron CLI is deprecated and will be removed in the future. Use openstack CLI instead.
The request you have made requires authentication. (HTTP 401) (Request-ID: req-19e08cea-6fc6-450a-a723-0864ed1cbbb4)

[karelyatin]

Yes neutron client is deprecated but it still should work, any way we need to switch to openstackclient which is a recommended client for interacting with OpenStack services why CLI, also TENANT vars deprecated need to use PROJECT now.