curl --request POST \
  --url http://localhost:3000/api/user/availableInstitutions \
  --header 'x-access-token: <api-key>'

{
  "success": true,
  "institutions": [
    {
      "_id": "<string>",
      "name": "<string>",
      "ainame": "<string>",
      "picture": "<string>",
      "about": "<string>",
      "allowJoining": "disabled"
    }
  ]
}