how do i setup a vault password for administraator@vsphere.local

How do I setup a vault password for user

administrator@vsphere.local?

echo Secret123 > vault_passwd

ansible-vault Esxi@123$% --name vcenter_password --vault-id my_user@vault_passwd

vcenter_password: !vault |
$ANSIBLE_VAULT;1.2;AES256;my_user
64323237323838303636616564643533353134663337316434326339643733613036623839643962
3466623963643136653661636663313334333661616533640a313730626238303630636230376338
63643638313835663563633664653163643765383935376234386635303534343966626130323164
3731363638356264630a393934323930366365366132626132633862656636343365623865393331
6362
Encryption successful

cat vcenter_vars.yml

vcenter_hostname: 10.65.201.2
vcenter_username: administrator@vsphere.local
vcenter_password: !vault |
$ANSIBLE_VAULT;1.2;AES256;my_user
64323237323838303636616564643533353134663337316434326339643733613036623839643962
3466623963643136653661636663313334333661616533640a313730626238303630636230376338
63643638313835663563633664653163643765383935376234386635303534343966626130323164
3731363638356264630a393934323930366365366132626132633862656636343365623865393331
6362

cat main.yml