Dynamic error message to login page

[Ansuman Nayak]

Hi all,

Can any one please help me with a solution for below.

I am using AbstractUsernamePasswordAuthenticationHandler(custom authentication handler) to  authenticate the request. In the method i do a api call for validating the username and password. 

Now i want to send a custom dynamic error message to the UI or login page in case of failure. Rather that using the static one from message.properties.

Thanks in Advance.