implement node redis adapter

[lengerrong]

☕️ Reasoning
This PR adds a new Node Redis adapter for NextAuth, enabling developers to use Redis as a storage backend for sessions, users, accounts, and verification tokens. The adapter implements the official NextAuth Adapter interface and includes comprehensive tests to ensure compatibility. This expands NextAuth’s supported databases and helps users who want a lightweight, fast Redis solution.

🧢 Checklist
Documentation — Added README with usage and configuration instructions

Tests — Implemented adapter tests using NextAuth’s adapter test harness

Ready to be merged — Fully functional, tested, and follows NextAuth contribution guidelines

🎫 Affected issues
It’s a new adapter feature, so no existing issues are directly closed by this PR.

📌 Resources
Security guidelines

Contributing guidelines

Code of conduct

Contributing to Open Source

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[lengerrong]

pnpm test --filter @auth/node-redis-adapter

@auth/[email protected] test /Users/eleng/Work/next-auth/packages/adapter-node-redis
./test/test.sh

Initializing container for Node-Redis tests
[+] Running 1/1
✔ redis Pulled 2.8s
[+] Running 2/2
✔ Network adapter-node-redis_default Created 0.0s
✔ Container adapter-node-redis-redis-1 Started 0.1s
Waiting 5s for db to start...

RUN v1.2.2 /Users/eleng/Work/next-auth/packages/adapter-node-redis
Coverage enabled with v8

stdout | src/utils.ts:31:13
Connected to Redis

✓ test/index.test.ts (22)
✓ Required (User, Account, Session) methods exist
✓ createUser
✓ getUser
✓ getUserByEmail
✓ createSession
✓ getSessionAndUser
✓ updateUser
✓ updateSession
✓ linkAccount
✓ getUserByAccount
✓ deleteSession
✓ Verification Token methods exist
✓ createVerificationToken
✓ useVerificationToken
✓ Future methods exist
✓ unlinkAccount
✓ deleteUser
↓ getAccount [skipped]
↓ createAuthenticator [skipped]
↓ getAuthenticator [skipped]
↓ listAuthenticatorsByUserId [skipped]
↓ updateAuthenticatorCounter [skipped]

Test Files 1 passed (1)
Tests 17 passed | 5 skipped (22)
Start at 14:26:21
Duration 2.43s (transform 184ms, setup 37ms, collect 1.94s, tests 29ms, environment 0ms, prepare 243ms)

[+] Running 2/2
✔ Container adapter-node-redis-redis-1 Removed 0.2s
✔ Network adapter-node-redis_default Removed