Accept organization invitation

curl --request POST \
  --url https://api.wacht.dev/organizations/invitations/accept \
  --header 'Content-Type: application/x-www-form-urlencoded' \
  --cookie session_id= \
  --data token=inv_token_abc123

{
  "status": 200,
  "message": "",
  "data": {
    "organization": {
      "id": "<string>",
      "name": "<string>"
    },
    "workspace": {
      "id": "<string>",
      "name": "<string>"
    },
    "signin_id": "555555555555555555",
    "already_member": false,
    "message": "Invitation accepted",
    "requires_signin": false,
    "invited_email": "user@example.com",
    "error_code": "<string>"
  },
  "session": {
    "id": "123456789012345678",
    "created_at": "2023-11-07T05:31:56Z",
    "updated_at": "2023-11-07T05:31:56Z"
  },
  "errors": [
    {
      "code": "INVALID_CREDENTIALS",
      "message": "Invalid credentials. Please try again."
    }
  ]
}