Google Sheets oAuth2 library authentication error: ERROR_invalid_redirect_uri

Hi there -

I am trying to connect to Zoho API through Google Sheets, using the oAuth2 Apps Script library (https://github.com/gsuitedevs/apps-script-oauth2)

However a grant token is not returned, and the authorisation url returns a "ERROR_invalid_redirect_uri" message.

Can you confirm that i should be able to authenticate using this library, and if so can you suggest how to resolve ? Here are some of the connection parameters i have been trying.

function getZohoService() {

return OAuth2.createService('Zoho')

.setAuthorizationBaseUrl('https://accounts.zoho.eu/oauth/v2/auth')

.setTokenUrl('https://accounts.zoho.eu/oauth/v2/token')

.setClientId(CLIENT_ID)

.setClientSecret(CLIENT_SECRET)

.setCallbackFunction('authCallback')

.setPropertyStore(PropertiesService.getUserProperties())

.setScope('ZohoCRM.users.ALL');

}

Many thanks

Chris Riggs.