I think I have seen the Almighty Lord in my dream in the form of someone I know or so I thought. I know it's not possible to see The Lord in any form. What happened with me?
According to scholarly opinion (like Shaykh al-Islam Ibn Taymiyah), it is possible to see Allah in a dream. But it is also possible that devil comes in dream and tells - 'I am Allah'.
The point to note is that in whatever form a believer sees Allah in dream, He is not at all like that, because
'There is nothing like unto Him'. (Quran 42:11)
Another important thing to know is that if, whoever he saw to be the Lord in his dream, commands him to do something against sharia, then very very likely he is devil in his dream. No dream can override what is established by Quran/Sunnah/Ijma'. Because Allah has said,
'This day I have perfected for you your religion and completed My favor upon you and have approved for you Islam as religion'(Quran 5:3)
Thus if the person in dream says, don't pray or it is ok to drink alcohol etc., then he (the dreamer) should never follow that. Our deen is established and can't be altered by any dream.
No body can see Allah in this life. The Prophet Muhammad (ﷺ) saw Allah in his dream.
If the dreamer is a righteous person (Islamic righteousness) and the dream does not contain anything haram or commanding anything haram, then maybe that a good news for him. It does not change anything as far as his righteousness goes, it does not mean he is a person of jannah etc. But a believer must always be vigilant that shaitan is not deceiving him, and he must strive to continue to do good deeds util he dies.
For more: https://islamqa.info/en/14096
Allah knows best!