I have been using REST API v1.1.
The following error message two days ago.
401:Authentication credentials (https://dev.twitter.com/pages/auth) were missing or incorrect. Ensure that you have set valid consumer key/secret, access token/secret, and the system clock is in sync.
message - Invalid or expired token.
code - 89
Again, it does not improve by authentication in a different API.
It is not possible to retweets, but you can only tweet.
Will the regulation of retweets has been enhanced with Twitter side?