curl --request POST \
  --url https://forgegames.org/api/users/{userId}/spaces \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --data '{
  "externalId": "<string>",
  "spaceId": "<string>"
}'

{
  "id": "<string>",
  "teamId": "<string>",
  "userId": "<string>",
  "externalId": "<string>",
  "spaceId": "<string>",
  "createdAt": "<string>",
  "updatedAt": "<string>"
}