Ultimos cambios para lista la base de datos.

src/components/Home/UserList.tsx

@@ -18,7 +18,11 @@ export class UserList extends React.Component<InterfaceProps, {}> {
         <p>(Saved on Sign Up in Firebase Database)</p>
 
         {Object.keys(users).map(key => (
-          <div key={key}>{users[key].username}</div>
+          <div key={key}>
+            <ul>
+              <li>{users[key].username}</li>
+            </ul>
+          </div>
         ))}
       </div>
     );

src/firebase/db.ts

@@ -6,5 +6,5 @@ export const doCreateUser = (id: string, username: string, email: string) =>
     email,
     username
   });
-
-export const onceGetUsers = () => db.ref("users").once("value");
+// Muy importante la barra invertida / 
+export const onceGetUsers = () => db.ref("/users").once("value");

src/firebase/firebase.ts

@@ -3,13 +3,13 @@ import "firebase/auth";
 import "firebase/database";
 
 const config = { 
- apiKey: "AIzaSyCkKEnwHf_jNlvCa2pW7O_Wo6jBXMS-uhQ",
-    authDomain: "fir-01-50904.firebaseapp.com",
-    projectId: "fir-01-50904",
-    storageBucket: "fir-01-50904.appspot.com",
-    messagingSenderId: "768893068305",
-    appId: "1:768893068305:web:0baecb76f39dea20ed3db0",
-    measurementId: "G-PTQQRK21P9"
+  apiKey: "AIzaSyC6IF_TzThVkBp5zOc4qQLurfhxRp_jHAY",
+  authDomain: "project-ii-ea7be.firebaseapp.com",
+  databaseURL: "https://project-ii-ea7be-default-rtdb.firebaseio.com",
+  projectId: "project-ii-ea7be",
+  storageBucket: "project-ii-ea7be.appspot.com",
+  messagingSenderId: "145315012674",
+  appId: "1:145315012674:web:cfda463e7acfb7c18acddb"
 };