How to configuar JWT auth for zoho desk ASAP in android ?

I am want to setup zoho desk sdk in my android application But problem occurred in JWT authentication part in sdk

From the documentation For setup jwt auth i setups jwt endpoint based on this docs https://help.zoho.com/portal/kb/articles/jwt-for-authenticating-users-in-the-asap-add-ons#How_does_a_JWT_work .

The actual problem at not fully explained documentation at https://www.zoho.com/desk/developers/asap/mobile-sdk/android/authenticating-users-in-the-sdk.html#android_authenticating_users_in_the_sdk

The code from above link

if(!isUserLoggedIn) {
    MyApplication.deskInstance.setUserToken("userToken", new DeskCallback.DeskSetUserCallback() {
        @Override
        public void onUserSetSuccess() {
        }
        @Override
        public void onException(DeskException exception) {
        }
    });
} else{
    //User already signed into SDK
}

I am familiar with jwt but in above code you not mentioned where i am get "userToken" in android.

In zoho desk android samples from github you take "userToken" from edit text. But you not mentioned

where i get jwt token? Is i take it from endpoint previously setups nodejs end point ? how to complete this task provide your solution asap