HI, I finally found out the error. The issue was, while creating the service(glance, neutron, nova) using the openstack command, I was giving the password as admin password($ADMIN_PWD). While in the conf files and the database of each service , the service password($SERVICE_PWD) was different. So I re-installed the whole set-up using the right configuration.(use ADMIN_PWD only while creating the admin user and for the admin-openrc.sh file).