Why does LinkedIn v2 Share API give not enough permissions error on any v2/shares endpoint?

Question

When I make a call to any v2 LinkedIn share API endpoint such as https://api.linkedin.com/v2/socialActions/{share URN}?oauth2_access_token={access token} I get a response sayin

Answer 1

Though it's not clear from the documentation, LinkedIn API is private. You need to request authorisation from them: https://developer.linkedin.com/partner-programs