There is a command group 'az_keyvault_certificate_contact'. This group of commands could 'manage contacts for certificate management'. The group of commands has global parameter '--debug' which means 'Increase logging verbosity to show all debug logs.'. The group of commands has global parameter '--help -h' which means 'Show this help message and exit.'. The group of commands has global parameter '--only-show-errors' which means 'Only show errors, suppressing warnings.'. The group of commands has global parameter '--output -o' which means 'Output format.'. The group of commands has global parameter '--query' which means 'JMESPath query string. See <a href="http://jmespath.org/">http://jmespath.org/</a> for more information and examples.'. The group of commands has global parameter '--subscription' which means 'Name or ID of subscription. You can configure the default subscription using `az account set -s NAME_OR_ID`.'. The group of commands has global parameter '--verbose' which means 'Increase logging verbosity. Use --debug for full debug logs.'. This group contains a child command 'az_keyvault_certificate_contact_add'.The syntax is: az keyvault certificate contact add --email
                                    --vault-name
                                    [--name]
                                    [--phone]. The parameter '--email' is required. It is used to contact e-mail address. must be unique.. The parameter '--vault-name' is required. It is used to name of the vault.. The parameter '--name' is optional. full contact name.. The parameter '--phone' is optional. contact phone number.. 