Request token retrieval failed:<br /><br />RESPONSE:<br /><br /><pre>Array
(
    [linkedin] => Array
        (
        )
    [info] => Array
        (
            [url] => https://api.linkedin.com/uas/oauth/requestToken
            [content_type] => 
            [http_code] => 0
            [header_size] => 0
            [request_size] => 0
            [filetime] => -1
            [ssl_verify_result] => 0
            [redirect_count] => 0
            [total_time] => 0.004098
            [namelookup_time] => 0.002396
            [connect_time] => 0.004107
            [pretransfer_time] => 0
            [size_upload] => 0
            [size_download] => 0
            [speed_download] => 0
            [speed_upload] => 0
            [download_content_length] => -1
            [upload_content_length] => -1
            [starttransfer_time] => 0
            [redirect_time] => 0
            [certinfo] => Array
                (
                )
        )
    [oauth] => Array
        (
            [header] => Authorization: OAuth realm="http%3A%2F%2Fapi.linkedin.com",oauth_version="1.0",oauth_nonce="bc493d6bb2ecf2dc88600b33d887942b",oauth_timestamp="1549569458",oauth_consumer_key="81dzxw7porkwt1",oauth_callback="http%3A%2F%2Fwww.myopencourses.com%2Fusers%2Fsocial_logins%2FlinkedIn_auth",oauth_signature_method="HMAC-SHA1",oauth_signature="poCSaR0ysuh%2F8%2BgyLnwcsipdFEU%3D"
            [string] => POST&https%3A%2F%2Fapi.linkedin.com%2Fuas%2Foauth%2FrequestToken&oauth_callback%3Dhttp%253A%252F%252Fwww.myopencourses.com%252Fusers%252Fsocial_logins%252FlinkedIn_auth%26oauth_consumer_key%3D81dzxw7porkwt1%26oauth_nonce%3Dbc493d6bb2ecf2dc88600b33d887942b%26oauth_signature_method%3DHMAC-SHA1%26oauth_timestamp%3D1549569458%26oauth_version%3D1.0
        )
    [error] => OAuth callback URL was not confirmed by the LinkedIn end-point
    [success] => 
)
</pre><br /><br />LINKEDIN OBJ:<br /><br /><pre>Array
(
    [linkedin] => Array
        (
        )
    [info] => Array
        (
            [url] => https://api.linkedin.com/uas/oauth/requestToken
            [content_type] => 
            [http_code] => 0
            [header_size] => 0
            [request_size] => 0
            [filetime] => -1
            [ssl_verify_result] => 0
            [redirect_count] => 0
            [total_time] => 0.004098
            [namelookup_time] => 0.002396
            [connect_time] => 0.004107
            [pretransfer_time] => 0
            [size_upload] => 0
            [size_download] => 0
            [speed_download] => 0
            [speed_upload] => 0
            [download_content_length] => -1
            [upload_content_length] => -1
            [starttransfer_time] => 0
            [redirect_time] => 0
            [certinfo] => Array
                (
                )
        )
    [oauth] => Array
        (
            [header] => Authorization: OAuth realm="http%3A%2F%2Fapi.linkedin.com",oauth_version="1.0",oauth_nonce="bc493d6bb2ecf2dc88600b33d887942b",oauth_timestamp="1549569458",oauth_consumer_key="81dzxw7porkwt1",oauth_callback="http%3A%2F%2Fwww.myopencourses.com%2Fusers%2Fsocial_logins%2FlinkedIn_auth",oauth_signature_method="HMAC-SHA1",oauth_signature="poCSaR0ysuh%2F8%2BgyLnwcsipdFEU%3D"
            [string] => POST&https%3A%2F%2Fapi.linkedin.com%2Fuas%2Foauth%2FrequestToken&oauth_callback%3Dhttp%253A%252F%252Fwww.myopencourses.com%252Fusers%252Fsocial_logins%252FlinkedIn_auth%26oauth_consumer_key%3D81dzxw7porkwt1%26oauth_nonce%3Dbc493d6bb2ecf2dc88600b33d887942b%26oauth_signature_method%3DHMAC-SHA1%26oauth_timestamp%3D1549569458%26oauth_version%3D1.0
        )
    [error] => OAuth callback URL was not confirmed by the LinkedIn end-point
    [success] => 
)
</pre>