Either your GPT-4 api key, or invite them as a team member to your OpenAI organization. Plus also ChatGPT. Yes they accomplish the same thing, but get them both

Either your GPT-4 api key, or invite them as a team member to your OpenAI organization. Plus also ChatGPT. Yes they accomplish the same thing, but get them both for a month or two and then cancel/revoke whichever one they’re not using. Maybe Midjourney, but not critical.