Hello, My application is using the OAuth2 Authorization Code Flow, and running into 429 errors when refreshing the access tokens. I have been refreshing tokens every hour, just since our system runs hourly tasks and daily tasks, and the access tokens are said to last 24 hours. Are we really not able to refresh every hour? Also, we are currently in a trial mode with our constant contact api and only have a few clients (websites) using our application to send their customers' emails to Constant Contact, and we plan to expand quite a bit.
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