attach display name

dashboard/src/main/Main.tsx

@@ -48,7 +48,7 @@ export default class Main extends Component<PropsType, StateType> {
           Cohere.identify(
             res?.data?.id, 
             {
-              username: res?.data?.email,
+              displayName: res?.data?.email,
               email: res?.data?.email, 
             }
           );