curl --request POST \
  --url https://api.example.com/api/widget/auth \
  --header 'Content-Type: application/json' \
  --data '
{
  "guest_id": "<string>",
  "agent_id": 123
}
'

{
  "access_token": "<string>",
  "token_type": "bearer",
  "agent_id": 123,
  "agent_name": "<string>",
  "agent_logo": "<string>",
  "agent_description": "<string>",
  "suggested_prompts": []
}