API oauth signature not valid

Hi All,

I am trying to get API response from “https://test.torshtalent.com/”. To get response from this server they are recommend to use an existing OAuth(version 1.0) library to generate this signature and authorization.

in my WordPress plugin i am using “wp_remote_post()” to send oauth keys and values like below

I am generating required OAuth values by using OAuth.php(external PHP library) and passing these values to “wp_remote_post” function.

$response = wp_remote_post( $url, array(
			'body' => array(
					'oauth_consumer_key'		=>	$cc_key,
					'oauth_version'				=>	'1.0',
					'oauth_nonce'				=>	$nonce,
					'oauth_timestamp'			=>	$timestamp,
					'oauth_signature_method'	=>	'HMAC-SHA1',
					'oauth_signature'			=>	$signature,
					'oauth_token'				=>	'*******',
					'API method'					=>	'Get Users Groups',
					'email'						=>	'************'
			)
	));

	if ( is_wp_error( $response ) ) {
		$error_message = $response->get_error_message();
		echo "Something went wrong: $error_message";
	} else {
	echo 'wp_remote_post Response:<pre>';
			print_r( $response );
			echo '</pre>';
	}

wp_remote_post response in else part like below
{"error":true,"reason":"API oauth signature not valid"}.

Note: I am checking these same OAuth values in google chrome “POST MAN” tool and the tool response is “success” like below.

{"success":true,"message:":"******************"}.

Can please help me guys on this issue, Thanks in advance.

https://wordpress.org/plugins/post/