diff --git a/README.md b/README.md
index cd67d50..7b89eb2 100644
--- a/README.md
+++ b/README.md
@@ -141,6 +141,14 @@ echo ".env" >> .gitignore
 
 ### 3. Protect a Route
 
+Open your project's `router.ex` file. e.g: 
+
+
+
+
+### (Optional) Update `endpoint.ex`
+
+
 
 
 
diff --git a/test/token_test.exs b/test/token_test.exs
index ebdbcef..2fdf11c 100644
--- a/test/token_test.exs
+++ b/test/token_test.exs
@@ -1,7 +1,12 @@
 defmodule AuthPlugTokenTest do
-  use ExUnit.Case, async: true
+  use ExUnit.Case, async: false
   import AuthPlug.Token
 
+  test "api_key/0 with AUTH_API_KEY" do
+    assert api_key() == System.get_env("AUTH_API_KEY")
+  end
+
+
   test "generate_jwt!/2 creates a JWT with the given data and secret" do
     secret = "secretcanbeanystringyouwant"
     data = %{email: "alex@dwyl.com", name: "Alex"}
@@ -21,4 +26,10 @@ defmodule AuthPlugTokenTest do
     {:ok, decoded} = verify_jwt(jwt, secret)
     assert data.email == Map.get(decoded, "email")
   end
+
+  test "api_key/0 with DWYL_API_KEY" do
+    System.put_env("DWYL_API_KEY", System.get_env("AUTH_API_KEY"))
+    assert api_key() == System.get_env("AUTH_API_KEY")
+    # System.put_env("DWYL_API_KEY", nil)
+  end
 end