File sharing doesnt work (Windows 11)

[u/JimmiVP]

Title might be wrong, but..

I want to share a folder from a computer. I have shared the folder, but when trying to access the folder from another computer it asks for credentials. I have tried every credential i can think of:
My name, the 5 letter user, my microsoft account, guest, admin. You name it.

File sharing is on for both private and public networks, CIF/Samba is installed/on, network discovery is on. I have tried EVERYTHING.

I cant get past the credentials log on. What to do? What ARE the credentials?