There are community-made "fixes" and modified versions of Feather that allow it to bypass official authentication. While these exist, they are often risky, potentially containing malware or being prone to crashes.
In the Minecraft community, "cracked" refers to versions of the game played without an official Mojang/Microsoft account. Does Feather Work for Cracked Users? feather client better cracked
Here is a deep dive into why Feather Client is dominated the conversation and how it stacks up against the competition. What is Feather Client? There are community-made "fixes" and modified versions of