curl --request GET \
  --url https://api.gleap.io/v3/helpcenter/collections/all \
  --header 'Authorization: Bearer <token>' \
  --header 'project: <project>'

[
  {
    "updatedAt": "<string>",
    "createdAt": "<string>",
    "iconUrl": "<string>",
    "extendedAudienceFilter": "<any>",
    "baseAudienceFilter": "<any>",
    "externalId": "<string>",
    "docId": 123,
    "lexorank": "<string>",
    "project": {
      "isValid": {},
      "createFromHexString": {},
      "createFromTime": {},
      "generate": {},
      "cacheHexString": "<any>",
      "prototype": "<string>"
    },
    "parent": {
      "isValid": {},
      "createFromHexString": {},
      "createFromTime": {},
      "generate": {},
      "cacheHexString": "<any>",
      "prototype": "<string>"
    },
    "title": "<any>",
    "description": "<any>",
    "targetAudience": "<string>"
  }
]