There is a command group 'az_load_test'. This group of commands could 'command group to manage load tests'. 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_load_test_update'.The syntax is: az load test update --load-test-resource
                    --test-id
                    [--certificate]
                    [--description]
                    [--display-name]
                    [--engine-instances]
                    [--env]
                    [--keyvault-reference-id]
                    [--load-test-config-file]
                    [--no-wait]
                    [--resource-group]
                    [--secret]
                    [--split-csv]
                    [--subnet-id]
                    [--test-plan]. The 1th example of the child command would be to use it to 'update a test with load test config file and don t wait for file upload', the syntax is: az load test update --load-test-resource sample-alt-resource --resource-group sample-rg --test-id sample-existing-test-id --load-test-config-file ~/resources/sample-config.yaml --no-wait. The 2th example of the child command would be to use it to 'update the display name and description for a test', the syntax is: az load test update --load-test-resource sample-alt-resource --resource-group sample-rg --test-id sample-existing-test-id --description "Test description" --display-name "Sample Name". The 3th example of the child command would be to use it to 'update a test with load test config file and override parameters using arguments', the syntax is: az load test update --load-test-resource sample-alt-resource --resource-group sample-rg --test-id sample-existing-test-id --load-test-config-file ~/resources/sample-config.yaml --engine-instances 1 --env name=value name=value. The 4th example of the child command would be to use it to 'remove the secrets from a test', the syntax is: az load test update --load-test-resource sample-alt-resource --resource-group sample-rg --test-id sample-existing-test-id --secret secret_name1="". The 5th example of the child command would be to use it to 'update the key vault reference identity to system assigned managed identity', the syntax is: az load test update --load-test-resource sample-alt-resource --resource-group sample-rg --test-id sample-existing-test-id --keyvault-reference-id null. The parameter '--load-test-resource --name -n' is required. It is used to name or arm resource id of the load testing resource.. The parameter '--test-id -t' is required. It is used to test id of the load test.. The parameter '--certificate' is optional. a single certificate in 'key[=value]' format. the certificate should be stored in azure key vault in pfx format, and the certificate identifier should be provided as the value.use "" to clear existing certificate.. The parameter '--description' is optional. description of the load test.. The parameter '--display-name' is optional. display name of the load test.. The parameter '--engine-instances' is optional. number of engine instances on which the test should run.. The parameter '--env' is optional. space-separated environment variables: key[=value] [key[=value] ...]. use "" to clear existing environment variables.. The parameter '--keyvault-reference-id' is optional. the identity that will be used to access the key vault. provide `null` or `none` to use the system assigned identity of the load test resource.. The parameter '--load-test-config-file' is optional. path to the load test config file. refer https://learn.microsoft.com/azure/load-testing/reference-test-config-yaml.. The parameter '--no-wait' is optional. do not wait for the long-running operation to finish.. 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 '--secret' is optional. space-separated secrets: key[=value] [key[=value] ...]. secrets should be stored in azure key vault, and the secret identifier should be provided as the value.use "" to clear existing secrets.. The parameter '--split-csv' is optional. split csv files evenly among engine instances.. The parameter '--subnet-id' is optional. resource id of the subnet to use for private load test.. The parameter '--test-plan' is optional. path to the jmeter script.. 