You don’t need a Mojang/Microsoft account. The game uses username‑only authentication, making it the top choice for anon play, LAN parties, and large‑scale “no premium required” events.
Given the lack of specific details, here are some general steps you might consider: eaglercraft 115 top
The multiplayer scene is active with several popular community-hosted servers: Eaglercraft You don’t need a Mojang/Microsoft account