Fix create market redirect

web/hooks/use-user.ts

@@ -2,7 +2,7 @@ import { useEffect, useState } from 'react'
 import { listenForLogin, listenForUser, User } from '../lib/firebase/users'
 
 export const useUser = () => {
-  const [user, setUser] = useState<User | null>(null)
+  const [user, setUser] = useState<User | null | undefined>(undefined)
   useEffect(() => listenForLogin(setUser), [])
 
   const userId = user?.id

web/pages/[username]/[contractId].tsx

@@ -64,7 +64,7 @@ export default function ContractPage() {
         )}
       </Col>
 
-      <BetsSection contract={contract} user={user} />
+      <BetsSection contract={contract} user={user ?? null} />
     </Col>
   )
 }

web/pages/create.tsx

@@ -13,7 +13,7 @@ export default function NewContract() {
   const creator = useUser()
 
   useEffect(() => {
-    if (!creator) router.push('/')
+    if (creator === null) router.push('/')
   })
 
   const [initialProb, setInitialProb] = useState(50)