replaced fmt.Println with logger usage

internal/server/login.go

@@ -63,7 +63,7 @@ func (s *Server) logoutPage(r *http.Request) (response.Response, error) {
 
 	if ck, err := r.Cookie("access_token"); err == nil && ck != nil {
 		if err := s.auth.DeleteOAuthTokens(r.Context(), ck.Value); err != nil {
-			fmt.Println("[ERROR] failed to delete auth token:", err)
+			s.log.Error("failed to delete auth token", "error", err)
 		}
 	}
 

internal/server/middleware/auth.go

@@ -6,6 +6,7 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"log/slog"
 	"net/http"
 	"time"
 
@@ -18,6 +19,7 @@ import (
 
 type (
 	Auth struct {
+		log         *slog.Logger
 		auth        *authentication.Authenticator
 		newLoginURL LoginURLProviderFunc
 		accts       *accounts.Store
@@ -36,11 +38,13 @@ type (
 )
 
 func NewAuth(
+	logger *slog.Logger,
 	auth *authentication.Authenticator,
 	newLoginURL LoginURLProviderFunc,
 	accts *accounts.Store,
 ) *Auth {
 	return &Auth{
+		log:         logger,
 		auth:        auth,
 		newLoginURL: newLoginURL,
 		accts:       accts,
@@ -133,7 +137,7 @@ func (a *Auth) AuthenticateAndAddIdentity(f response.HandlerFunc, assertions ...
 		if refreshFloor := expiration.Add(-(idTokenLifetime / 4)); refreshFloor.Before(now) {
 			accessToken, expiration, err = a.auth.RefreshAccessToken(ctx, accessToken)
 			if err != nil {
-				fmt.Println("failed to refresh access token:", err)
+				a.log.Warn("failed to refresh access token", "error", err)
 				return response.TemporaryRedirect("/").
 					Body(io.NopCloser(bytes.NewBuffer([]byte(fmt.Sprintf("failed to refresh access token: %v", err))))).
 					Cookie(cookies.Expired("access_token")), nil

internal/server/server.go

@@ -104,7 +104,9 @@ func NewServer(
 		accts:     accts,
 		etsy:      etsy,
 		auth:      auth,
+		// TODO: shouldn't this ACTUALLY be a middleware?
 		authMiddleware: middleware.NewAuth(
+			logger.WithGroup("auth-middleware"),
 			auth,
 			newLoginURL,
 			accts,

internal/server/webhooks/etsy/webhooks.go

@@ -121,7 +121,7 @@ func (h Webhooks) redirectURI(w http.ResponseWriter, r *http.Request) {
 	ok, err := h.etsy.HandleNewAuthCode(ctx, acctID, state, q.Get("code"))
 	if err != nil {
 		w.WriteHeader(http.StatusForbidden)
-		fmt.Println("failed to handle new auth code:", err)
+		h.log.Error("failed to handle new auth code", "error", err)
 		return
 	}
 	if !ok {