Security-related question about a possible exposed credential

[Emma-NYL]

Hello,

My name is Emma, I am conducting an academic study on possible credential exposure in public GitHub repositories.

While analyzing this repository, I found a string that may represent a credential. I'm including the code snippet below containing possible leakage. To avoid exposing sensitive information publicly, I marked the sensitive information.

Could you please help clarify whether the detected string is:

1. a real credential, or
2. a placeholder / example value?

Thank you for your time.

---

Code snippet (sensitive values masked):

import { StackNavigator } from 'react-navigation';
import { FormLabel, FormInput } from 'react-native-elements'

export default class login extends React.Component {
    constructor(props) {
        super(props);
        this.state = { email: 'Test****t.com', password: '1****', error: '', loading: false };
    }
    onLoginPress() {
        
        this.setState({ error: '', loading: true });

        const { email, password } = this.state;

Thank you in advance for your time - I really appreciate it!

Sincerely,
Emma