Add some debug output to auth module

auth/imap.go

@@ -6,6 +6,8 @@ import (
 
 	"github.com/emersion/go-imap/client"
 	"github.com/emersion/go-sasl"
+
+	"git.sr.ht/~sircmpwn/tokidoki/debug"
 )
 
 type IMAPProvider struct {
@@ -43,6 +45,7 @@ func (prov *IMAPProvider) doAuth(next http.Handler,
 
 	conn, err := prov.dial()
 	if err != nil {
+		debug.Printf("Auth dial error: %v", err)
 		http.Error(w, "Temporary authentication error, try again later", http.StatusServiceUnavailable)
 		return
 	}
@@ -50,6 +53,7 @@ func (prov *IMAPProvider) doAuth(next http.Handler,
 
 	auth := sasl.NewPlainClient("", user, pass)
 	if err := conn.Authenticate(auth); err != nil {
+		debug.Printf("Auth error: %v", err)
 		http.Error(w, "Invalid username or password", http.StatusUnauthorized)
 		return
 	}