问解析错误:第1行第8列的无效数字文字

EN

set -eu
set -x

USER_EMAIL="user@domain.org"
USER_PASSWORD="password"
CLIENT_ID="id"
CLIENT_SECRET="secret"
DOMAIN_NAME="domain.org"

data()
{
  local template='
{
  "grant_type":    "password",
  "username":      $username,
  "password":      $password,
  "audience":      "https://localhost:8443/my-composite-service",
  "scope":         "openid email test:read test:write",
  "client_id":     $client_id,
  "client_secret": $client_secret
}'

  if jq <<<null -c \
        --arg username      "${USER_EMAIL}" \
        --arg password      "${USER_PASSWORD}" \
        --arg client_id     "${CLIENT_ID}" \
        --arg client_secret "${CLIENT_SECRET}" \
        "$template"
  then
    return
  else
    printf "ERROR: Can not format request data." >&2
    exit 1
  fi
}

post()
{
  if curl --request POST \
          --url     'https://${DOMAIN_NAME}/getmy/token' \
          --header  'content-type: application/json' \
          --data    "$1" \
          -s
  then
    return
  else
    printf "ERROR: Can not send post request." >&2
    exit 1
  fi
}

token()
{
  if jq -r .access_token
  then
    return
  else
    printf "ERROR: Can not parse JSON response." >&2
    exit 1
  fi
}

TOKEN="$(post "$(data)" | token)"