Merge PR OCA#690 into 16.0

Signed-off-by moylop260

Author: OCA-git-bot

password_security/models/res_users.py

@@ -144,6 +144,8 @@ def _validate_pass_reset(self):
             if pass_min <= 0:
                 continue
             write_date = user.password_write_date
+            if not write_date:
+                continue
             delta = timedelta(hours=pass_min)
             if write_date + delta > datetime.now():
                 raise UserError(