Using knife azurerm

knife azurerm server create --azure-resource-group-name ‘Default-Storage-WestUS’ --azure-vm-name ‘testchangeiis’ -N ‘testchangeiis’ --azure-service-location ‘westus’ --azure-image-reference-publisher ‘MicrosoftWindowsServer’ --azure-image-reference-offer ‘WindowsServer’ --azure-image-reference-sku ‘2012-R2-Datacenter’ --azure-image-reference-version ‘latest’ -x ‘user’ -P ‘password’ -r “recipe[iis::default]” -c /root/chef-repo/.chef/knife.rb --yes

When I run this command it starts to create the vm and then I get this error message:

7afqypodypzqmtestchangeiis is not a valid storage account name

Even if I use: --azure-storage-account ‘testchangeiis’ it add the 7afqypodypzqm