Click "Login" to authenticate without restarting the client.
: Ensure your computer's date and time are synced automatically, as mismatches can cause authentication to fail. SessionLogin.jar
A Minecraft Session ID is essentially a . If a malicious actor obtains your session ID, they can access your account and join servers as you without needing your password. Never share your session ID with anyone. Click "Login" to authenticate without restarting the client
If you suspect your session has been compromised, or log out and back in; this usually invalidates the old session ID and generates a new one. Common Troubleshooting If a malicious actor obtains your session ID,
: Open your command prompt and run ipconfig /flushdns to clear potential network conflicts. Session ID Login Mod - GitHub
: This is the most common fix to refresh a stale token.