[chef] How to recover the pivotal user in Chef12 ?

[Fanny Strudel < >]

Hello,

I can't find a way to solve my issue so I'm posting here.
I've installed chef12 from scratch and created some users using (replacing  
by good values of source):


  chef-server-ctl user-create USER_NAME FIRST_NAME  
LAST_NAME EMAIL PASSWORD -f USER_NAME.pem -o ORGANIZATION
  chef-server-ctl org-user-add ORGANIZATION USER_NAME  
--admin

And then, I deleted the initial 'pivotal' user thinking that I did not  
need it anymore using:

# chef-server-ctl user-delete pivotal

But now I can't create any more users or do any operations:


 
 chef-server-ctl user-list
ERROR: Failed to authenticate to https://127.0.0.1:443 as pivotal with key  
/etc/opscode/pivotal.pem
Response:  Failed to authenticate as 'pivotal'. Ensure that your node_name  
and client key are correct.

And if I try with the key I created earlier: permission error (though as  
admin I thought I could do it).
Same thing with the original admin user:


 :~# chef-server-ctl user-list -V -u admin -k  
/etc/chef-server/admin.pem
INFO: Using configuration from /etc/opscode/pivotal.rb
INFO: HTTP Request Returned 403 Forbidden: error
ERROR: You authenticated successfully to https://127.0.0.1:443 as admin  
but you are not authorized for this action


Any idea on how to restore this pivotal user ?

Thanks
Fanny