I keep getting the following error when I try to use the Mailchimp OAUTH2 sample app (PHP).
For your reference, here's their github repo: https://github.com/mailchimp/OAuth2-sample-apps
However, my client id and client secret are correct (have copied and pasted them multiple times).
Complete Failure!: redirect_uri_mismatch
This likely means that you have entered a bad client_id or client_secret or you are being awesome and checking to see this failure occur.
Try Again?
If it helps, I'm using the Yii 2 framework.