You can display all the vCenter Server connections that are configured by running the command:
# vla_credentials -l
For example:
# vla_credentials -l
ID    Schema & port   Hostname         User               Server Type   Associated servers   Certificate validation     Hostname validation
-------------------------------------------------------------------------------------------------------------------------------------------
vc0   https:443       vc.example.com   user@example.com   vcenter       -                    use a stored certificate   enabled
vc1   https:443       192.0.2.1        user@example.com   vcenter       -                    enabled                    disabled

Add a vCenter Server Connection

To add a new vCenter Server onto the vla-service, run the command:
# vla_credentials –a –s vcenter –n <FQDN> -u <user> [-A <vRO_id>][-f]
Parameters:
  <FQDN> - vCenter server FQDN.
  <user> – Administrator user for vCenter.
  <vRO_id> – vCenter Orhestration ID on VMware LaMa Service.
  [-f] – Using force mode, for ignore validation certificate.

Show further commandline options uning -h

# vla_credentials -h
Some examples:
# vla_credentials -a -s vcenter -n vcenter.example.local -u 'DOMAIN_ALIAS\user' -A vro1 -P https:443
# vla_credentials -a -s vcenter -n vcenter.example.local -u 'example.org\user' -A vro1 -P https:443
# vla_credentials -a -s vcenter -n vcenter.example.local -u user@example.org -A vro1 -P https:443
# vla_credentials -a -s vcenter -n vcenter.example.local -u user -A vro1 -P https:443
# vla_credentials -a -s vro -n vro.example.local -u user -P https:443