Add SSH key

curl --request POST \
  --url https://cloud-api.phala.com/api/v1/user/ssh-keys \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "<string>",
  "public_key": "<string>"
}
'

{
  "id": "<string>",
  "user_id": "<string>",
  "name": "<string>",
  "public_key": "<string>",
  "fingerprint": "<string>",
  "key_type": "<string>",
  "source": "<string>",
  "created_at": "<string>",
  "updated_at": "<string>",
  "key_metadata": {},
  "last_synced_at": "<string>"
}