There is a command group 'az_iot_central_app'. This group of commands could 'manage iot central applications'. 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_iot_central_app_create'.The syntax is: az iot central app create --name
                          --resource-group
                          --subdomain
                          [--display-name]
                          [--location]
                          [--mi-system-assigned]
                          [--no-wait]
                          [--sku {st0, st1, st2}]
                          [--template]. The 1th example of the child command would be to use it to 'create an iot central application in the region of the resource group using the default pricing sku', the syntax is: az iot central app create -n my-first-iot-app -g MyResourceGroup -s my-iot-app. The 2th example of the child command would be to use it to 'create an iot central application the in the  east us  region with the  st1  pricing plan and an industry template', the syntax is: az iot central app create -n my-first-iot-app -g MyResourceGroup -s my-iot-app -l eastus -p ST1 -t iotc-distribution. The 3th example of the child command would be to use it to 'create an iot central application using system assigned managed identity', the syntax is: az iot central app create -n my-first-iot-app -g MyResourceGroup -s my-iot-app --mi-system-assigned. The parameter '--name -n' is required. It is used to give your iot central app a unique name so you can find it later.this will be used as the resource name in the azure portal and cli.avoid special characters `-` instead, use lower case letters (a-z), numbers (0-9), and dashes (-).. 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 '--subdomain -s' is required. It is used to enter a unique url. your app will be accessible via https://<subdomain>.azureiotcentral.com/. avoid special characters `-` instead, use lower case letters (a-z), numbers (0-9), and dashes (-).. The parameter '--display-name -d' is optional. custom display name for the iot central app. this will be used in the iot central application manager to help you identify your app. default value is the resource name.. The parameter '--location -l' is optional. where your app's info and resources are stored. we will default to the location of the target resource group. see documentation for a full list of supported locations.. The parameter '--mi-system-assigned' is optional. provide this flag to use system assigned identity.. The parameter '--no-wait' is optional. do not wait for the long-running operation to finish.. The parameter '--sku -p' is optional. pricing plan for iot central application.. The parameter '--template -t' is optional. iot central application template name. default is "custom application". see documentation for a list of available templates.. 