There is a command group 'az_notification hub_credential_apns'. 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_notification hub_credential_apns_update'.The syntax is: az notification-hub credential apns update --name
                                           --namespace-name
                                           --resource-group
                                           [--apns-certificate]
                                           [--app-id]
                                           [--app-name]
                                           [--certificate-key]
                                           [--endpoint]
                                           [--key-id]
                                           [--token]. The 1th example of the child command would be to use it to 'update apns certificate', the syntax is: az notification-hub credential apns update --namespace-name my-namespace --notification-hub-name my-hub --apns-certificate "/path/to/certificate" --certificate-key "xxxxxx" --resource-group MyResourceGroup. The parameter '--name --notification-hub-name -n' is required. It is used to the notification hub name.. The parameter '--namespace-name' is required. It is used to the namespace name.. 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 '--apns-certificate' is optional. the apns certificate.. The parameter '--app-id' is optional. the issuer (iss) registered claim key. the value is a 10-character teamid, obtained from your developer account. specify if using token authentication mode.. The parameter '--app-name' is optional. the name of the application or bundleid. specify if using token authentication mode.. The parameter '--certificate-key' is optional. the apns certificate password if it exists.. The parameter '--endpoint' is optional. the apns endpoint of this credential. if using certificate authentication mode and sandbox specify 'gateway.sandbox.push.apple.com'. if using certificate authentication mode and production specify 'gateway.push.apple.com'. if using token authentication mode and sandbox specify 'https://api.development.push.apple.com:443/3/device'. if using token authentication mode and production specify 'https://api.push.apple.com:443/3/device'.. The parameter '--key-id' is optional. a 10-character key identifier (kid) key, obtained from your developer account. specify if using token authentication mode.. The parameter '--token' is optional. provider authentication token, obtained through your developer account. specify if using token authentication mode.. 