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# v0 failing to implement authentication with NextAuth and BetterAuth in Next.js

17 views · 1 like · 2 posts


Michael Sachdev (@dcazrael) · 2026-03-15 · ♥ 1

## Problem
Tried to give `v0` a properly drafted spec and it did a fantastic job on the frontend, but it failed repeatedly on the authentication implementation.

## Current Behavior
1. **NextAuth/Auth.js**: `v0` suggested this but couldn't get it working after 5 tokens.
2. **JWT Solution**: Attempted a custom `JWT` solution, which also failed after 2 tokens.
3. **BetterAuth**: Tried `better-auth`, but `v0` claimed incompatibility despite it being designed for `Next.js`.

Pretty disappointed that a simple auth flow doesn’t work. The frontend part took around 1.5 tokens, but losing 90% of my tokens for non-working auth is frustrating.

## Environment
- Framework: `Next.js` (User mentioned version 16)
- Tool: `v0` 

Now granted it’s a free tool for me, the tokens were granted for free. But this gives me 0 confidence of purchasing tokens for it.


Philipp Soldunov (@psoldunov) · 2026-03-26

Having same issue with an existing app that I want to migrate to v0