I'm using Expo SDK for my ios app, when I try to write data in the firebase database but I'm getting the error. ****Error: FIREBASE FATAL ERROR: Cannot parse Firebase URL. Please use https://.firebaseio.com****\*

My firebase config file is

```
const firebaseConfig = {
  apiKey: "xxxxxx",
  authDomain: "xxxxxx.firebaseapp.com",
  databaseURL: "https://xxxxxxxxxxxxxx.europe-west1.firebasedatabase.app",
  projectId: "xxxxx",
  storageBucket: "xxxxxxx.appspot.com",
  messagingSenderId: "xxxxxxxxx",
  appId: "xxxxxxxxxx",
  measurementId: "xxxxxx"
};

```

my function that stores the data is

```

signUp = () => {
   const user = firebase.auth().currentUser;
   let userid = user.uid;

   firebase
     .database()
     .ref(`users/${userid}`)
     .set({
       firstname: this.state.firstname,
       lastname: this.state.lastname,
       password: this.state.password,
       email: this.state.email,
       dob: this.state.dob,
       postcode: this.state.postcode,
     })
     .then(() => {
       alert("user created");
     })
     .catch((err) => {
       alert("error");
     });
 };

```

My database rules are set to true for reading and write.

I have tried the following database URL but none of them work.

```
const firebaseConfig = {

  databaseURL: "https://xxxxxxxxxxxxxx.europe-west1.firebaseio.com",

};
const firebaseConfig = {

  databaseURL: "https://xxxxxxxxxxxxxx.firebaseio.com",

};

```

Looking for help, please