realtime databaseにpushできない

記入フォームのコード

react.js
1const INITIAL_SCORE_DATA = {
2    score: 0,
3    date: '',
4    type: '',
5};
6
7
8
9class InputData extends Component {
10    constructor(props){
11        super(props);
12        this.state = {...INITIAL_SCORE_DATA};
13    }
14
15    onChange = event => {
16       this.setState({ [event.target.name]: event.target.value });
17    };
18
19    onCreateData = event => {
20        const authUser = JSON.parse(localStorage.getItem('authUser'));
21        this.props.firebase.scores(authUser.uid).push({
22            date: this.state.date,
23            type: this.state.type,
24            score: this.state.score,
25        });
26        this.setState({...INITIAL_SCORE_DATA});
27        event.preventDefault();
28    }
29
30
31    render() {
32        const { score, date, type } = this.state;
33
34        const isInvalid = score === 0 || date === '' || type === '';
35
36        return (
37            <div>
38            <h1>InputData</h1>
39            <form onSubmit={this.onCreateData}>
40                <input 
41                type='text'
42                name='type'
43                value={type}
44                onChange={this.onChange}/>
45                <input 
46                type='text'
47                name='date'
48                value={date}
49                onChange={this.onChange}/>
50                <input
51                type='number'
52                name='score'
53                value={score}
54                onChange={this.onChange}/>
55                <button disabled={isInvalid} type='submit'>Submit Data</button>
56            </form>
57            </div>
58        )
59    }
60}
61

firebaseのdatabase.ref関数のコード一部

react.js
1    members = uid => this.db.ref(`groups/${uid}/members`);
2
3    member = (uid, memberId) => this.db.ref(`groups/${uid}/members/${memberId}`);
4
5    scores = uid => this.db.ref(`groups/${uid}/scores`);

members, member関数は別コンポーネントで使用していて正常に動きます。scoresが動かないです…。コードは基本的に同じなのですがさっぱりです。どのような可能性が考えられますか？