There is a command group 'az_spring cloud_app'. This group of commands could 'commands to manage apps in azure spring cloud'. 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_spring cloud_app_append persistent storage'.The syntax is: az spring-cloud app append-persistent-storage --mount-path
                                              --name
                                              --persistent-storage-type
                                              --resource-group
                                              --service
                                              --share-name
                                              --storage-name
                                              [--mount-options]
                                              [--read-only {false, true}]. The 1th example of the child command would be to use it to 'append a new persistent storage to an app', the syntax is: az spring-cloud app append-persistent-storage --persistent-storage-type AzureFileVolume --share-name MyShareName --mount-path /MyMountPath --storage-name MyStorageName -n MyApp -g MyResourceGroup -s MyService. The parameter '--mount-path' is required. It is used to the path for the persistent storage volume to be mounted.. The parameter '--name -n' is required. It is used to name of app.. The parameter '--persistent-storage-type -t' is required. It is used to type of the persistent storage volumed.. 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 '--service -s' is required. It is used to name of azure spring cloud, you can configure the default service using az configure --defaults spring-cloud=<name>.. The parameter '--share-name' is required. It is used to the name of the pre-created file share. sharename should be provided only if the type of the persistent storage volume is azurefilevolume.. The parameter '--storage-name' is required. It is used to name of the storage resource you created in azure spring cloud.. The parameter '--mount-options' is optional. [optional] the mount options for the persistent storage volume.. The parameter '--read-only' is optional. [optional] if true, the persistent storage volume will be read only.. 