diff --git a/public/main/inc/lib/api.lib.php b/public/main/inc/lib/api.lib.php
index 8f43f009df..dda9bed3fd 100644
--- a/public/main/inc/lib/api.lib.php
+++ b/public/main/inc/lib/api.lib.php
@@ -7433,20 +7433,6 @@ function api_get_locked_settings()
     ];
 }
 
-/**
- * Checks if the user is corrently logged in. Returns the user ID if he is, or
- * false if he isn't. If the user ID is given and is an integer, then the same
- * ID is simply returned.
- *
- * @param  int User ID
- *
- * @return bool Integer User ID is logged in, or false otherwise
- */
-function api_user_is_login($user_id = null)
-{
-    return Container::getAuthorizationChecker()->isGranted('IS_AUTHENTICATED_FULLY');
-}
-
 /**
  * Guess the real ip for register in the database, even in reverse proxy cases.
  * To be recognized, the IP has to be found in either $_SERVER['REMOTE_ADDR'] or
diff --git a/public/main/inc/lib/course.lib.php b/public/main/inc/lib/course.lib.php
index 6cc7e28ba4..ee2306a2ce 100644
--- a/public/main/inc/lib/course.lib.php
+++ b/public/main/inc/lib/course.lib.php
@@ -5216,7 +5216,7 @@ class CourseManager
             $my_course['register_button'] = '';
 
             $access_link = self::get_access_link_by_user(
-                api_get_user_id(),
+                $user_id,
                 $course_info,
                 $codeList
             );
@@ -5485,10 +5485,12 @@ class CourseManager
             $options[] = 'register';
         }
 
+        $isLogin = !api_is_anonymous();
+
         // Go To Course button (only if admin, if course public or if student already subscribed)
         if ($is_admin ||
             COURSE_VISIBILITY_OPEN_WORLD == $course['visibility'] && empty($course['registration_code']) ||
-            (api_user_is_login($uid) && COURSE_VISIBILITY_OPEN_PLATFORM == $course['visibility'] && empty($course['registration_code'])) ||
+            ($isLogin && COURSE_VISIBILITY_OPEN_PLATFORM == $course['visibility'] && empty($course['registration_code'])) ||
             (in_array($course['real_id'], $user_courses) && COURSE_VISIBILITY_CLOSED != $course['visibility'])
         ) {
             $options[] = 'enter';
@@ -5496,7 +5498,7 @@ class CourseManager
 
         if ($is_admin ||
             COURSE_VISIBILITY_OPEN_WORLD == $course['visibility'] && empty($course['registration_code']) ||
-            (api_user_is_login($uid) && COURSE_VISIBILITY_OPEN_PLATFORM == $course['visibility'] && empty($course['registration_code'])) ||
+            ($isLogin && COURSE_VISIBILITY_OPEN_PLATFORM == $course['visibility'] && empty($course['registration_code'])) ||
             (in_array($course['real_id'], $user_courses) && COURSE_VISIBILITY_CLOSED != $course['visibility'])
         ) {
             $options[] = 'enter';
@@ -5505,7 +5507,7 @@ class CourseManager
         if (COURSE_VISIBILITY_HIDDEN != $course['visibility'] &&
             empty($course['registration_code']) &&
             UNSUBSCRIBE_ALLOWED == $course['unsubscribe'] &&
-            api_user_is_login($uid) &&
+            $isLogin &&
             in_array($course['real_id'], $user_courses)
         ) {
             $options[] = 'unsubscribe';
diff --git a/public/main/inc/lib/template.lib.php b/public/main/inc/lib/template.lib.php
index 0d576fff1d..797a7134b1 100644
--- a/public/main/inc/lib/template.lib.php
+++ b/public/main/inc/lib/template.lib.php
@@ -1155,7 +1155,7 @@ class Template
         $user_info = [];
         $user_info['logged'] = 0;
         $this->user_is_logged_in = false;
-        if (api_user_is_login()) {
+        if (!api_is_anonymous()) {
             $user_info = api_get_user_info(api_get_user_id(), true);
             $user_info['logged'] = 1;
 
diff --git a/public/main/index/whoisonline.php b/public/main/index/whoisonline.php
index 64ab26135e..5b4e1fc2ee 100644
--- a/public/main/index/whoisonline.php
+++ b/public/main/index/whoisonline.php
@@ -52,7 +52,7 @@ if ($user_list) {
 $whoisonline_list .= SocialManager::display_user_list($user_list);
 
 if (isset($_GET['id'])) {
-    if ('true' == api_get_setting('allow_social_tool') && api_user_is_login()) {
+    if ('true' == api_get_setting('allow_social_tool') && !api_is_anonymous()) {
         header("Location: ".api_get_path(WEB_CODE_PATH)."social/profile.php?u=".intval($_GET['id']));
         exit;
     }
diff --git a/public/plugin/zoom/lib/ZoomPlugin.php b/public/plugin/zoom/lib/ZoomPlugin.php
index 40c85fc283..594abacea2 100644
--- a/public/plugin/zoom/lib/ZoomPlugin.php
+++ b/public/plugin/zoom/lib/ZoomPlugin.php
@@ -104,7 +104,6 @@ class ZoomPlugin extends Plugin
             return false;
         }
 
-        //return 'true' === api_get_plugin_setting('zoom', 'enableGlobalConference') && api_user_is_login();
         return
             'true' === api_get_plugin_setting('zoom', 'enableGlobalConference')
             && in_array(