improve typing and responses

client/src/pages/NewAccount/NewAccount.tsx

@@ -31,8 +31,8 @@ export const NewAccount = () => {
     })
       .then(async (res) => {
         const result = await res.json();
-        if (result.error) {
-          setError(result.error);
+        if (result.errors) {
+          setError(result.errors[0]);
         } else {
           login(data.email, data.password);
         }

client/src/providers/AuthProvider.tsx

@@ -47,7 +47,7 @@ export const AuthProvider = ({ children, ...rest }: AuthProviderProps) => {
         }),
       }).then(async (res) => {
         if (res.status === 200) {
-          setToken((await res.json()).token);
+          setToken((await res.json()).data.token);
           setIsLoginDialogOpen(false);
         }
       });