bingus-auth

Until a player authenticates, bingus-auth blocks packets, movement, chat and interactions, and teleports the player to a configurable spawn point. Before the mod is compiled, the spawn location in AuthConfig.kt must be edited, since it ships set to 0 400 0 in the overworld; this keeps the true coordinates out of view for players who have not logged in yet. Passwords are checked with Argon2 hashing for Java players, and authentication state is kept per session, so logging out clears it.

The mod was made because the easyauth mod had not yet been updated to Minecraft 26.1. It is a lightweight option for Fabric servers and needs only a jar in the server's mods folder, together with a configuration file. Bedrock players connecting through Floodgate are detected by their UUID and are authenticated automatically, without a password.

Installation requires Fabric Loader 0.18.5 or later, Fabric API and Fabric Language Kotlin. It runs on the server alone, so players need nothing extra to join. The files target 26.1.1 and cover 1.21.11 – 26.1.1 across three release versions. The code is released under the MIT License and is not open source.