Fix OAuth Auth Issue on Clover POS App

Project Title

Debug Production Clover POS OAuth – Invalid OAuth Credentials (Base44 App)

Project Description

I’m looking for an experienced Clover POS developer to help debug and resolve a production OAuth authentication issue with my Clover app.

The app is built on Base44 (frontend + backend) and is approved by Clover, but during the OAuth flow I’m receiving “Invalid OAuth Credentials” errors when merchants attempt to connect their Clover account.

This is not a beginner task — I need someone who has worked directly with Clover OAuth, production apps, and redirect URI debugging.

Environment

Clover POS Production

App already approved in Clover Developer Dashboard

Backend hosted on Base44

OAuth flow: Clover → Redirect URI → Token exchange

The Issue

OAuth authorization initiates correctly

Clover redirects back to my app

Token exchange fails with Invalid OAuth Credentials

Redirect URI recently updated and needs verification

Need to confirm:

Client ID / Client Secret handling

Redirect URI exact match

OAuth token request format

Base44 environment variables are not altering secrets

Production vs sandbox credential mismatch

What I Need Help With

Review Clover OAuth configuration (production)

Verify redirect URI and token exchange flow

Identify why Clover is rejecting OAuth credentials

Fix the issue so merchants can successfully connect Clover

Optional: quick walkthrough explaining the fix