Create new consumer

curl --request POST \
  --url https://api.chift.eu/consumers \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "name": "<string>",
  "email": "<string>",
  "internal_reference": "<string>",
  "redirect_url": "<string>"
}'

{
  "consumerid": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "name": "<string>",
  "email": "<string>",
  "internal_reference": "<string>",
  "redirect_url": "<string>"
}