Import Plug.Conn for convenience

lib/asciinema/auth.ex

@@ -1,19 +1,21 @@
 defmodule Asciinema.Auth do
+  import Plug.Conn
   alias Asciinema.{Repo, User}
-  alias Plug.Conn
+
+  @user_key "warden.user.user.key"
 
   def init(opts) do
     opts
   end
 
   def call(conn, _opts) do
-    user_id = Conn.get_session(conn, "warden.user.user.key")
+    user_id = get_session(conn, @user_key)
     user = user_id && Repo.get(User, user_id)
-    Conn.assign(conn, :current_user, user)
+    assign(conn, :current_user, user)
   end
 
   def get_basic_auth(conn) do
-    with ["Basic " <> auth] <- Conn.get_req_header(conn, "authorization"),
+    with ["Basic " <> auth] <- get_req_header(conn, "authorization"),
          auth = String.replace(auth, ~r/^%/, ""), # workaround for 1.3.0-1.4.0 client bug
          {:ok, username_password} <- Base.decode64(auth),
          [username, password] <- String.split(username_password, ":") do
@@ -28,6 +30,6 @@ defmodule Asciinema.Auth do
   end
   def put_basic_auth(conn, username, password) do
     auth = Base.encode64("#{username}:#{password}")
-    Conn.put_req_header(conn, "authorization", "Basic " <> auth)
+    put_req_header(conn, "authorization", "Basic " <> auth)
   end
 end