How to delete a volume through the api

Nomad
1

I created it like this

type = "csi"
id   = "test-node-0"
name = "test-node-0"
capacity_min = "21474836480"
capacity_max = "21474836480"

mount_options {
  fs_type = "xfs"
}

capability {
  access_mode     = "single-node-writer"
  attachment_mode = "block-device"
}
plugin_id       = "cephrbd"   
secrets {
  userID  = "nomadAdmin"
  userKey = "AQAPSo9iR2l1LRAA0NBPZNx8Lg1tccwk/0QBOA=="
}
parameters {
  clusterID = "3dae7d80-fffd-45a3-85d4-2fd48c4a9d28"
  pool      = "nomad"
  imageFeatures = "layering"
}

But when deleting, the error is reported. Please see what the problem is

# curl \
>     --request DELETE \
>     -H "X-Nomad-CSI-Secrets: userID="nomadAdmin",userKey="AQAPSo9iR2l1LRAA0NBPZNx8Lg1tccwk/0QBOA=="" \
>     http://xxxnomad.com/v1/volume/csi/test-node-0/delete?namespace=test-es
rpc error: controller delete volume: CSI.ControllerDeleteVolume: controller plugin returned an internal error, check the plugin allocation logs for more information: rpc error: code = Internal desc = missing key field 'userKey' in secrets