"I saw the Prophet ﷺ in my sleep, and told him about the practice of holding celebratory feasts on the day of his birth and he replied “If someone rejoices in us, we rejoice in him!"
— Shaykh Abū Mūsā al-Zarhūnī (ra)
This has been suggested as proof of the Mawlid Al Nabi. Is this reliable and can we use what a Shaykh sees in a dream of Rasoolullah as evidence - as if you see him it is him as Shaytaan can't impersonate the Prophet.