Deprecation of Legacy API Keys

Support for using Legacy API Keys ends with the 19.0.0 release of Flywheel Core.

As part of a site upgrade to version 19.0.0 or later, all existing Legacy API Keys are removed, thus that Flywheel site will reject all authentication attempts using those Legacy API Keys.

Users still using Legacy API Keys should migrate to Enhanced API Keys (instructions) prior to their site upgrade to avoid disruption.