Add auth navigations

src/state/models/root-store.ts

@@ -4,12 +4,21 @@
 
 import {Instance, SnapshotOut, types} from 'mobx-state-tree'
 import {createContext, useContext} from 'react'
+import {SessionModel, createDefaultSession} from './session'
 
-export const RootStoreModel = types.model('RootStore').props({})
+export const RootStoreModel = types.model('RootStore').props({
+  session: SessionModel,
+})
 
 export interface RootStore extends Instance<typeof RootStoreModel> {}
 export interface RootStoreSnapshot extends SnapshotOut<typeof RootStoreModel> {}
 
+export function createDefaultRootStore() {
+  return {
+    session: createDefaultSession(),
+  }
+}
+
 // react context & hook utilities
 const RootStoreContext = createContext<RootStore>({} as RootStore)
 export const RootStoreProvider = RootStoreContext.Provider