error responce 401 in twitter api in iphone - twitter

I am integrating api in my application. when I am trying to tweet I am getting an error request 401, it seems to "Authentication credentials were missing or incorrect". How will I remove this error ?
Thanks

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<< ERROR Twitter Search 0:2 Execute failed: 400:The
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This is the status code will be returned during version 1.0 rate
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This errors is due to you are issuing your request without authentication, first you need to authenticate against twitter and after you're be able to issue the request properly.

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Laravel 5 Socialite Error on Facebook and Google

My code
$user = Socialize::with('facebook')->user();
then got
Client error response [url] https://graph.facebook.com/oauth/access_token?client_id=1562205014036534&client_secret=3b9807e0d826bfd66fb3fbdc627fd015&code&redirect_uri=http%3A%2F%2Ffacebooktest.dev [status code] 400 [reason phrase] Bad Request
and google
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got look like same
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but twitter it's work
thank for clarify
I had the same problem and it was because of the version of socialite. I downgraded to 2.0.0 and the problem was gone.
The problem is your services(config/services.php). check your facebook client_id and client_secret if it correspond with the one from your facebook developers page.
If you are trying to loggin with another facebook account to test your application in development phase, it will throw same error.
Enjoy........

Using the same OAuth token for multiple Twitter requests

I am working on an app that uses the same OAuth token and OAuth token secret for multiple requests to post a tweet on behalf of a user. On the first request, the tweet is successfully posted. However on subsequent requests I get an HTTP Error 403: Forbidden. Could this be caused by reusing the OAuth tokens? I am also tweeting the same message on each request.
There are two components of a Twitter error response, the HTTP status code (in this case 403) and an error code that provides more detail on the cause of the failure. Which error code are you seeing in the JSON response? It's possible that the error is regarding duplicate tweets.
Twitter REST API error codes

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