added JS api to access current user in frontend (#4064)

public/build/entrypoints.json

@@ -3,7 +3,7 @@
     "app": {
       "js": [
         "/build/runtime.f0079159.js",
-        "/build/app.f0378e96.js"
+        "/build/app.79ed1fb4.js"
       ],
       "css": [
         "/build/app.5710a463.css"
@@ -63,7 +63,7 @@
   },
   "integrity": {
     "/build/runtime.f0079159.js": "sha384-H22sAW1aTvyIPqvHOvGXWSWTxf0y6mptp+MsVmyXCfjx/WJjBbhX9gbUZ+qIuihV",
-    "/build/app.f0378e96.js": "sha384-ohZkuGMYJFa1nD/JJb1XJy6CYfqk/ubIo9QuY3yYJFg7NEG+0U93+YIIvUnCm2xm",
+    "/build/app.79ed1fb4.js": "sha384-QQ83F5EDtEEzO9+/Sg8jAkxsM/GVnZmTdC/a7p83t4zxVU1VYPD2AKp21pcM1Lj1",
     "/build/app.5710a463.css": "sha384-kqam1K3HVJSgDgp3YsKvzA5VGQQB2USKq6UbuIHQvn9tshMribY5Axgg2ar7vTIR",
     "/build/export-pdf.d367a32e.js": "sha384-Z5baqnzjI636nYFs4g63ViIKBZKRW4Jhv/7PQmTEQlqhfA7eK0vUMUtiyy0R5A9u",
     "/build/export-pdf.d8a6c23b.css": "sha384-ztepocHE4rnGE9eKZ4kL6jTKaePUyiwiB9TjJjstjpf/ckcKg1HedrEOOk/8ElJg",