Ajax issue

coc-ajax-requests.js

//Add resource to a users Resources in Gigya
    $('body').on('click', '.add-resource', function(event){
        event.preventDefault();

        var link = $(this);
		    var postID = link.data('id');

        $.ajax({
            url: COC_Ajax.ajaxurl,
            type: 'post',
            data: {
                action: 'coc-gigya-add-resource',
                uid: coc_gigya_cookie,
                postID : postID,
                nonce: COC_Ajax.ajax_nonce,
				        crossDomain: true,
                xhrFields: {
                    withCredentials: true
                },

            },
            success: function(response) {
                $(link).addClass('remove-resource').removeClass('add-resource').text('Remove From My Classroom');
            }
        });

	});

functions.php

/**
 * Enqueue scripts and styles
 */
function coc_scripts() {
	wp_enqueue_script( 'coc-ajax-requests', get_template_directory_uri() . '/assets/js/coc-ajax-requests.js', array( 'jquery' ), true );

	wp_localize_script( 'coc-ajax-requests', 'COC_Ajax', array(
        'ajaxurl' => admin_url( 'admin-ajax.php' ),
        'editProfileNonce' => wp_create_nonce( 'edit-gigya-profile' ),
        'ajax_nonce' => wp_create_nonce( 'coc_gigya_ajax_nonce' ),
        )
    );


}
add_action( 'wp_enqueue_scripts', 'coc_scripts' );

gigya.php

/**
 * Adds a resource to a users Resources.
 *
 */
add_action( 'wp_ajax_coc-gigya-add-resource', 'coc_gigya_add_resource' );
add_action( 'wp_ajax_nopriv_coc-gigya-add-resource', 'coc_gigya_add_resource' );
function coc_gigya_add_resource() {

	if ( isset( $_POST['nonce'] ) && wp_verify_nonce( sanitize_key( $_POST['nonce'] ), 'coc_gigya_ajax_nonce' ) ) {

		if ( isset( $_POST['uid'] ) && isset( $_POST['postID'] ) ) {

            $uid  = sanitize_text_field( wp_unslash( $_POST['uid'] ) );
            $post_id = sanitize_text_field( wp_unslash( $_POST['postID'] ) );

            //Get the users information
            $method = 'accounts.getAccountInfo';
            $request  = new GSRequest( COC_GIGYA_API_KEY, COC_GIGYA_SECRET_KEY, $method, null );
            $request->setParam( 'uid', '1234' );
            $response = $request->send();

            if ( 0 === $response->getErrorCode() ) {

                $valid = SigUtils::validateUserSignature( $response->getString( 'UID','' ), $response->getString( 'signatureTimestamp','' ), COC_GIGYA_SECRET_KEY, $response->getString( 'UIDSignature','' ) );

                if ( $valid ) {

                    $response_data = json_decode( $response->getResponseText() );

                    if ( ! empty( $response_data ) ) {
                		  if ( ! empty( $response_data->data->resources ) ) {

                			  $current_resources = explode( ',', $response_data->data->resources );

                        if ( ! in_array( $post_id, $current_resources ) ) {
                          array_unshift( $current_resources, $post_id );
                          $updated_resources = implode( ',', $current_resources );
                        } else {
                            $updated_resources = $current_resources;
                        }

                      } else {
                          $updated_resources = $post_id;
                      }

                      //Set the users information with the new post id
                      $method = 'accounts.setAccountInfo';
    					        $request  = new GSRequest( COC_GIGYA_API_KEY, COC_GIGYA_SECRET_KEY, $method, null );
    					        $request->setParam( 'uid', $uid );

    					        $data = new GSObject();

                      $data->put( 'resources', $updated_resources );
                      $request->setParam( 'data', $data );

                      $response = $request->send();
                      // Step 4 - handling the request's response.
                      if ( $response->getErrorCode() === 0 ) {
                        wp_send_json_success( $response );
                      } else {  // Error
                        wp_send_json_error( $response->getErrorCode() );
                      }
                    }
                }
            } else {
                wp_send_json_error( $response->getErrorCode() );
            }
		}// End if().
	}// End if().

	wp_die();
}