How to use the @aws-amplify/auth.verifiedContact function in @aws-amplify/auth

checkContact(user) {
        if (!Auth || typeof Auth.verifiedContact !== 'function') {
            throw new Error('No Auth module found, please ensure @aws-amplify/auth is imported');
        }
        Auth.verifiedContact(user)
            .then(data => {
                if (!JS.isEmpty(data.verified)) {
                    this.changeState('signedIn', user);
                } else {
                    const newUser = Object.assign(user, data);
                    this.changeState('verifyContact', newUser);
                }
            });
    }

checkContact(user) {
		if (!Auth || typeof Auth.verifiedContact !== 'function') {
			throw new Error(
				'No Auth module found, please ensure @aws-amplify/auth is imported'
			);
		}

		Auth.verifiedContact(user).then(data => {
			if (!JS.isEmpty(data.verified)) {
				this.changeState('signedIn', user);
			} else {
				const newUser = Object.assign(user, data);
				this.changeState('verifyContact', newUser);
			}
		});
	}

checkContact(user) {
		if (!Auth || typeof Auth.verifiedContact !== 'function') {
			throw new Error(
				'No Auth module found, please ensure @aws-amplify/auth is imported'
			);
		}
		Auth.verifiedContact(user).then(data => {
			if (!JS.isEmpty(data.verified)) {
				this.changeState('signedIn', user);
			} else {
				user = Object.assign(user, data);
				this.changeState('verifyContact', user);
			}
		});
	}

checkContact(user) {
        if (!Auth || typeof Auth.verifiedContact !== 'function') {
            throw new Error('No Auth module found, please ensure @aws-amplify/auth is imported');
        }
        Auth.verifiedContact(user)
            .then(data => {
                if (!JS.isEmpty(data.verified)) {
                    this.changeState('signedIn', user);
                } else {
                    user = Object.assign(user, data);
                    this.changeState('verifyContact', user);
                }
            });
    }

checkContact(user) {
        if (!Auth || typeof Auth.verifiedContact !== 'function') {
            throw new Error('No Auth module found, please ensure @aws-amplify/auth is imported');
        }
        Auth.verifiedContact(user)
            .then(data => {
                if (!JS.isEmpty(data.verified)) {
                    this.changeState('signedIn', user);
                } else {
                    user = Object.assign(user, data);
                    this.changeState('verifyContact', user);
                }
            });
    }