curl --request GET \
  --url https://api.lemlist.com/api/user/channels \
  --header 'Authorization: Basic <encoded-value>'

{
  "plan": "Multichannel Expert",
  "email": {
    "connected": true,
    "available": true,
    "accounts": [
      {
        "id": "usm_bsdepN6jb8zftK9Ns",
        "email": "john@acme.com",
        "provider": "google"
      }
    ]
  },
  "linkedin": {
    "connected": true,
    "available": true
  },
  "whatsapp": {
    "connected": false,
    "available": true,
    "addonActive": false,
    "accounts": []
  }
}