Error: Invalid Tower authentication credentials (HTTP 401).

I am getting below error using tower-cli

tower-cli version

Tower CLI 3.3.9
API v2
Error: Invalid Tower authentication credentials (HTTP 401).

Try with curl once to verify the auth creds: # curl -ki --user admin:password -XGET http://localhost:8080/api/v2/ping/

Regards,
Ompragash