POST update to Twitter using Oauth and HTTR, R -

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i trying post update twitter using api. following steps @ https://github.com/hadley/httr/blob/master/demo/oauth1-twitter.r, can get call work, haven't managed post work. here relevant code:

library(httr) library(httpuv)   oauth_endpoints("twitter")  myapp <- oauth_app("twitter",  key = "key" secret = "secret"  )   twitter_token <- oauth1.0_token(oauth_endpoints("twitter"), myapp)   #this works fine req <- get("https://api.twitter.com/1.1/statuses/home_timeline.json",  config(token = twitter_token))     #this doesn't work.  returns error 403: status forbidden post(url = "https://api.twitter.com/1.1/statuses/update.json",      body = "test",       config(token = twitter_token)      )

any solution allows status update (tweet) r acceptable.

the docs need pass parameter status query parameter, not in body, makes sense b/c can 140 characters long anyway. 

post("https://api.twitter.com/1.1/statuses/update.json",      query = list(status = "testing r"),      config(token = twitter_token) )

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