You need to have at least one Account linked to your user in order to grant access

Getting this issue while click on “Try This API” and added my app details(Key,Secret),
It redirects me to login page after adding credentials getting this message.

Doc link : Keap REST API

Sandbox Login link : https://signin.infusionsoft.com/login

Screenshot_from_2020_07_17_15_50_16_png_1600×900_

Please share any link from which i can link account.