maxctrl utility is not working and getting "Access denied" error

Hi,

When we try to invoke maxctrl utility we are getting the following error/warning

[maxscale@dbcct3vmyd01006 ~]$ maxctrl --version
1.0.0
[maxscale@dbcct3vmyd01006 ~]$ maxctrl list servers
{
"errors": [

{ "detail": "Access denied" }

]
}

Maxscale log file warnings:
=====================

2018-05-17 05:23:03 warning: Authentication failed for 'maxscale', using password. Request: GET /v1/
2018-05-17 05:23:10 warning: Authentication failed for 'maxscale', using password. Request: GET /v1/
2018-05-17 05:23:14 warning: Authentication failed for 'maxscale', using password. Request: GET /v1/
2018-05-17 05:23:27 warning: Authentication failed for 'maxscale-admin', using password. Request: GET /v1/
2018-05-17 05:27:53 warning: Authentication failed for 'admin', using password. Request: GET /v1/
2018-05-17 05:27:59 warning: Authentication failed for 'admin', using password. Request: GET /v1/

Find out output of all users at maxadmin

[maxscale@dbcct3vmyd01006 ~]$ maxadmin
MaxScale> show users
Enabled Linux accounts (secure) : root, maxscale, admin
Created network accounts (insecure):
MaxScale> exit

Also would like to know how to create an admin account under Created network accounts (insecure):

Thanks,
Venkat Beru