old_contents: from django.utils.translation import ugettext_lazy as _
  
  
  class Messages(object):
      INVALID_CREDENTIALS_ERROR = _("Unable to log in with provided credentials.")
      INACTIVE_ACCOUNT_ERROR = _("User account is disabled.")
      INVALID_TOKEN_ERROR = _("Invalid token for given user.")
      INVALID_UID_ERROR = _("Invalid user id or user doesn't exist.")
      STALE_TOKEN_ERROR = _("Stale token for given user.")
      PASSWORD_MISMATCH_ERROR = _("The two password fields didn't match.")
      USERNAME_MISMATCH_ERROR = _("The two {0} fields didn't match.")
      INVALID_PASSWORD_ERROR = _("Invalid password.")
      EMAIL_NOT_FOUND = _("User with given email does not exist.")
      CANNOT_CREATE_USER_ERROR = _("Unable to create account.")
  
new_contents: from django.utils.translation import gettext_lazy as _
  
  
  class Messages(object):
      INVALID_CREDENTIALS_ERROR = _("Unable to log in with provided credentials.")
      INACTIVE_ACCOUNT_ERROR = _("User account is disabled.")
      INVALID_TOKEN_ERROR = _("Invalid token for given user.")
      INVALID_UID_ERROR = _("Invalid user id or user doesn't exist.")
      STALE_TOKEN_ERROR = _("Stale token for given user.")
      PASSWORD_MISMATCH_ERROR = _("The two password fields didn't match.")
      USERNAME_MISMATCH_ERROR = _("The two {0} fields didn't match.")
      INVALID_PASSWORD_ERROR = _("Invalid password.")
      EMAIL_NOT_FOUND = _("User with given email does not exist.")
      CANNOT_CREATE_USER_ERROR = _("Unable to create account.")
  
subject: Fix deprecation warning