Cannot login using st2admin

[herdeshverma]

Hello Team,
I have st2 deployed in k8s. I was trying to enable ldap and rbac on st2 by making changes auth section of st2-config configmap. I also created few roles, assigments and mapping using configmap and executed st2-apply-rbac-definitions --config-file=/etc/st2/st2.docker.conf command on st2client to sync the mappings.
I successfully enabled ldap authentication and I was able to login using my ldap credential.
Later I felt the need of switching back to standalone auth mode and I reverted the changes in st2-config configmap, deleted all the mappings reran st2-apply-rbac-definitions --config-file=/etc/st2/st2.docker.conf but now I am not able to login to UI using my st2admin credentials.

[herdeshverma]

Currently my st2-config look like below:

    [api]
    allow_origin = '*'
    auth_cookie_same_site = none
    auth_cookie_secure = True

    [auth]
    mode = standalone
    # backend = ldap
    enable = True
    use_ssl = False
    logging = /etc/st2/logging.auth.conf
    debug = True

    [rbac]
    sync_remote_groups = True

Default is flat-file and I have st2admin along with credential entry in the flat-file