There is a command group 'az_network_vpn gateway'. This group of commands could 'manage site to site vpn gateways'. 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_network_vpn gateway_create'.The syntax is: az network vpn-gateway create --name
                              --resource-group
                              [--asn]
                              [--bgp-peering-address]
                              [--location]
                              [--no-wait {0, 1, f, false, n, no, t, true, y, yes}]
                              [--peer-weight]
                              [--scale-unit]
                              [--tags]
                              [--vhub]. The 1th example of the child command would be to use it to 'create a site to site vpn gateway', the syntax is: az network vpn-gateway create -n MyVPNGateway -g MyRG --vhub MyVHub -l westus. The parameter '--name -n' is required. It is used to name of the vpn gateway.. The parameter '--resource-group -g' is required. It is used to name of resource group. you can configure the default group using `az configure --defaults group=<name>`.. The parameter '--asn' is optional. bgp speaker's asn.. The parameter '--bgp-peering-address' is optional. peering address and bgp identifier of this bgp speaker.. The parameter '--location -l' is optional. location. values from: `az account list-locations`. you can configure the default location using `az configure --defaults location=<location>`.  when not specified, the location of the resource group will be used.. The parameter '--no-wait' is optional. do not wait for the long-running operation to finish.. The parameter '--peer-weight' is optional. weight added to routes learned from this bgp speaker.. The parameter '--scale-unit' is optional. the scale unit for this vpn gateway.. The parameter '--tags' is optional. space-separated tags: key[=value] [key[=value] ...].  support shorthand-syntax, json-file and yaml-file. try "??" to show more.. The parameter '--vhub' is optional. name or id of a virtual hub.. 