When did authorities lie? The position on masks changed over time as data was acquired. Unless you mean when the FDA/CDC was worried about a run on masks, which they were right about.
But I think ascribing a malicious intent to that learning process is disingenuous.
The only people that have made literally malicious claims have been people on the far-right, which unfortunately are some authorities so I guess you're right about Trump and his bootlicks who intentionally lied for personal gain. And continue to do so.