Refactor API of /api/v2/users/{uid}/subscriptions

scnserver/logic/permissions.go

@@ -5,6 +5,7 @@ import (
 	"blackforestbytes.com/simplecloudnotifier/api/ginresp"
 	"blackforestbytes.com/simplecloudnotifier/models"
 	"database/sql"
+	"errors"
 	"gogs.mikescher.com/BlackForestBytes/goext/langext"
 )
 
@@ -43,7 +44,7 @@ func (ac *AppContext) CheckPermissionChanMessagesRead(channel models.Channel) *g
 			return nil // owned channel
 		} else {
 			sub, err := ac.app.Database.Primary.GetSubscriptionBySubscriber(ac, p.Token.OwnerUserID, channel.ChannelID)
-			if err == sql.ErrNoRows {
+			if errors.Is(err, sql.ErrNoRows) {
 				return langext.Ptr(ginresp.APIError(ac.ginContext, 401, apierr.USER_AUTH_FAILED, "You are not authorized for this action", nil))
 			}
 			if err != nil {