diff --git a/src/utils/auth.js b/src/utils/auth.js
new file mode 100644
index 0000000..e568fcb
--- /dev/null
+++ b/src/utils/auth.js
@@ -0,0 +1,22 @@
+import { validate } from "../api/authentication";
+
+export const getAuthHeader = () => {
+  const user = JSON.parse(localStorage.getItem("user"));
+  return user && user.token ? `Bearer ${user.token}` : "";
+};
+
+export const validateUser = () => {
+  validate().then(json => {
+    if (!json.success) {
+      localStorage.removeItem("user");
+    }
+  });
+};
+
+export const isLogin = () => {
+  if (localStorage.getItem("user")) {
+    return true;
+  }
+
+  return false;
+};