At 17:00 UTC on Monday February 10th, we will be completing the full deprecation of support for Infura API V1 credentials. In Q1 of 2019 we announced that all requests to Infura needed to be sent using your Infura Project ID credentials as described in our documentation https://infura.io/docs/gettingStarted/authentication
. After this release V1 credentials and unauthenticated requests will cease to work. Requests already using the correct Project ID credentials will be unaffected by this maintenance event. No downtime is expected for this update.