Azure SignalR and React native

I need help adding chat functionalities for my mobile app ASAP. I am using Azure SignalR and react native.

Requirement:
1. One-on-one messaging
2. Group chatroom

What will be given:
1. The react native source code.
2. SignalR endpoint.

Deliverables
1. SignalR backend (Dotnet.Core)
2. React native code that is used to connect to the SignalR backend

Delivery Time:
2-3 days