fixed db issues

internal/db/userrole.go

@@ -2,6 +2,7 @@ package db
 
 import (
 	"context"
+	"database/sql"
 
 	"git.haelnorr.com/h/oslstats/internal/roles"
 	"github.com/pkg/errors"
@@ -72,9 +73,12 @@ func HasRole(ctx context.Context, tx bun.Tx, userID int, roleName roles.Role) (b
 	err := tx.NewSelect().
 		Model(user).
 		Relation("Roles").
-		Where("u.id = ? ", userID).
+		Where("u.id = ?", userID).
 		Scan(ctx)
 	if err != nil {
+		if err == sql.ErrNoRows {
+			return false, nil
+		}
 		return false, errors.Wrap(err, "tx.NewSelect")
 	}
 	for _, role := range user.Roles {