code: def send_reset_password_instructions(user):
      
      token = generate_reset_password_token(user)
      reset_link = url_for_security(
          'reset_password', token=token, _external=True
      )
  
      if config_value('SEND_PASSWORD_RESET_EMAIL'):
          _security.send_mail(config_value('EMAIL_SUBJECT_PASSWORD_RESET'),
                              user.email, 'reset_instructions',
                              user=user, reset_link=reset_link)
  
      reset_password_instructions_sent.send(
          app._get_current_object(), user=user, token=token
      )
docs: Sends the reset password instructions email for the specified user.
  
      :param user: The user to send the instructions to