curl --request POST \
  --url http://localhost:3000/api/user/institutionByJoinId \
  --header 'Content-Type: application/json' \
  --header 'x-access-token: <api-key>' \
  --data '
{
  "joinId": "abc123xyz"
}
'

{
  "success": true,
  "institution": {
    "_id": "<string>",
    "name": "<string>",
    "ainame": "<string>",
    "picture": "<string>",
    "allowJoining": "disabled"
  }
}