Building a custom SPA for WFM metrics and trying to implement Auth Code flow with PKCE. The token exchange fails with 400 Bad Request and error invalid_grant.
// Generating code_challenge
const params = new URLSearchParams({
code: authCode,
redirect_uri: window.location.origin,
grant_type: 'authorization_code',
code_verifier: verifier,
client_id: process.env.REACT_APP_CLIENT_ID
});
Verified the verifier matches the base64url hash sent in the initial request. Is there a specific character encoding issue with the Genesys token endpoint?