Sol's AuthLogin
by solmochi
Sol's AuthLogin is a Forge and NeoForge server mod that adds account login and registration, with token-based auto-login for returning players.
What it does
Servers that run in offline mode or host cracked accounts can use the mod to require a login before a player can play. Until a player has authenticated, the player is restricted from normal play. Once logged in, the player receives a unique login token, and later joins can reuse that token for auto-login instead of typing the password again. The author describes the token system as a replacement for older IP-based sessions.
Passwords are stored with SHA-256 hashing and a unique salt for each user. The mod is meant to be installed on the server, in the mods folder. Installing it on the client is recommended for the auto-login feature to work reliably, and a client-side mod provides manual login as a fallback when the client does not have it. The mod is published for 1.20.1 and 1.21.1 on Forge and NeoForge, with 1.16.5 also listed among the game versions that have files. Only the server has to run it, while players may add it, and the mod is not open source; it is released under All rights reserved.
Key features
Login and registration
Players register an account and log in before they can take part in the server, which covers the account layer that servers often lack.
Token-based auto-login
After a successful login, a unique token lets returning players join without re-entering their password.
Salted password hashing
Passwords are hashed with SHA-256 and a unique salt per user rather than stored in plain text.
Pre-authentication restriction
Players who have not authenticated are kept out of normal play until they log in.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
How it compares
The Best Login is a Forge-only client and server mod for 1.20.1, open source under the MIT License, so both sides must run it. NullPass is a NeoForge server-side only mod for 1.21.1 under the MIT License and is not open source, so players join without installing anything. PasswordGate covers Forge and NeoForge for 1.20.1 – 1.21.1, is open source under the Apache License 2.0, and runs on client and server. Sol's AuthLogin is server required with optional client installation, and is not open source.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Sol's AuthLogin | Forge and NeoForge | 1.16.5 – 1.21.1 | Server required, client optional | 2026-08-10 |
| The Best Login | Forge | 1.20.1 | Client and server | 2026-03-20 |
| NullPass | NeoForge | 1.21.1 | Server-side only | 2026-08-10 |
| PasswordGate | Forge and NeoForge | 1.20.1 – 1.21.1 | Client and server | 2026-08-10 |
Questions
Does Sol's AuthLogin need to be installed on the client?
Which loaders and versions does Sol's AuthLogin support?
How are passwords stored?
In the catalog
Sol's AuthLogin is one of 8,016 Management mods on ModsFinder, and one of 2,698 Management mods for Forge. 32,366 mods support Minecraft 1.21.1.
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What the author says
Sol’s AuthLogin is a powerful and secure authentication system designed for Minecraft servers, now upgraded with a modern token-based auto-login system for improved security and player experience. Note: Required to install into server/mods folder and is recommended to be installed on client-side as well for…
Official listing
- Modrinth page
- modrinth.com/mod/sols-authlogin
- Owner
- solmochi
- Published
- 2026-05-13
- Updated on Modrinth
- 2026-08-10
- Facts verified
- 2026-10-15