Send message to group

[nexa-backend]

hello can i send a message to group via api ?

[nexa-backend]

var client = api.store()
.findChatByName(request.getGroupName())
.filter(Chat::isGroup)
.orElseThrow(() -> new NoSuchElementException("grup dont exist"));

this is my code to get the group

[nexa-backend]

it said the store is null