There is a command group 'az_vm_user'. This group of commands could 'manage user accounts for a vm'. 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_vm_user_update'.The syntax is: az vm user update --username
                  [--ids]
                  [--name]
                  [--no-wait]
                  [--password]
                  [--resource-group]
                  [--ssh-key-value]
                  [--subscription]. The 1th example of the child command would be to use it to 'update a windows user account  if username does not exist  a new user will be created', the syntax is: az vm user update -u username -p password -n MyVm -g MyResourceGroup. The 2th example of the child command would be to use it to 'update a linux user account        filename   syntax is not supported on command prompt or powershell', the syntax is: az vm user update -u username --ssh-key-value "$(< ~/.ssh/id_rsa.pub)" -n MyVm -g MyResourceGroup. The 3th example of the child command would be to use it to 'update a user on all vms in a resource group        filename   syntax is not supported on command prompt or powershell', the syntax is: az vm user update -u username --ssh-key-value "$(< ~/.ssh/id_rsa.pub)" --ids $(az vm list -g MyResourceGroup --query "[].id" -o tsv). The parameter '--username -u' is required. It is used to the user name.. The parameter '--ids' is optional. one or more resource ids (space-delimited). it should be a complete resource id containing all information of 'resource id' arguments. you should provide either --ids or other 'resource id' arguments.. The parameter '--name -n' is optional. the name of the virtual machine. you can configure the default using `az configure --defaults vm=<name>`.. The parameter '--no-wait' is optional. do not wait for the long-running operation to finish.. The parameter '--password -p' is optional. the user password.. The parameter '--resource-group -g' is optional. name of resource group. you can configure the default group using `az configure --defaults group=<name>`.. The parameter '--ssh-key-value' is optional. ssh public key file value or public key file path. this command appends the new public key text to the ~/.ssh/authorized_keys file for the admin user on the vm. this does not replace or remove any existing ssh keys.. The parameter '--subscription' is optional. name or id of subscription. you can configure the default subscription using `az account set -s name_or_id`.. 