It is possible to save a refresh token inside of an access token, and then access it on refresh but I don't see why you would want to do that? I never seen anyone do that so I would say it maybe isnt good practice. I would just stick to keeping them separate in the header.
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…