Adding custom page without authentication in react-admin

Question

I want to add a signup page to my react-admin web portal. Since react-admin do not provide a signup page, I created a custom page and added it to custom routes:

customRoutes.js

import React from 'react';
import { Route } from 'react-router-dom';
import SignupForm from './signupForm';

export default [
    <Route path="/signup" component={SignupForm} noLayout/>,
];

The problem is that I am only able to open the page at /signup when a user is already signed in. Otherwise I am automatically redirected to /login route.

How to disable authentication for custom routes? Is there some attribute which <Route> accepts or something to do with the dataProvider.js?

EDIT:

Adding the representative code for my signupForm.js:

import React from 'react';
import TextField from '@material-ui/core/TextField';
import Button from '@material-ui/core/Button';
import Dialog from '@material-ui/core/Dialog';
import { fetchUtils } from 'react-admin';
import { ApiUrl } from './config';

class SignupForm extends React.Component {
    constructor() {
        super();
        this.state = {
            fields: {
                username: '',
                password: ''
            }
    }


    handleChange = name => event => {
        let fields = this.state.fields;
        fields[name] = event.target.value;

        this.setState({
            fields: fields,
        });
    };

    handleSubmit = (event) => {
        // Prevent default
        event.preventDefault();

        if (this.handleValidation()) {
            let body = JSON.parse(JSON.stringify(this.state.fields));

            let url = ApiUrl + '/api/user/create';
            let options = {}
            options.headers = new Headers({ Accept: 'application/json' });
            options.method = 'POST'
            options.body = JSON.stringify(body);
            fetchUtils.fetchJson(url, options)
                .then(data => {
                    alert(data.json.message);
                    this.props.history.push('/login')
                })
                .catch((err, ...rest) => {
                    console.log(err.status, err.message);
                    alert(err.message);
                });
        }
    }

    render() {
        const { classes } = this.props;

        const actions = [
            <Button
                type="submit"
                label="Submit"
                color='primary'
                variant="flat"
            >Submit</Button>,
        ];

        return (
            <Dialog
                open={true}
                style={{
                    textAlign: "center",
                }}
                onClose={this.handleClose}
                classes={{ paper: classes.dialogPaper }}
            >
                <DialogTitle>Create an Account</DialogTitle>
                <form className={classes.container} noValidate autoComplete="off" onSubmit={this.handleSubmit}>
                    <TextField
                        required
                        id="username"
                        label="Username"
                        value={this.state.fields["username"]}
                        onChange={this.handleChange('username')}
                    />
                    <br />
                    <TextField
                        required
                        id="password"
                        label="Password"
                        value={this.state.fields["password"]}
                        onChange={this.handleChange('password')}
                        type="password"
                    />

                    <div style={{ textAlign: 'right', padding: 40 }}>
                        {actions}
                    </div>
                </form>
            </Dialog>
        );
    }
}

export default withStyles(styles)(SignupForm);

Answer 1

The problem was that on request to /signup, react-admin was calling the authProvider with type AUTH_GET_PERMISSIONS whose code was:

if (type === AUTH_GET_PERMISSIONS) {
    const role = localStorage.getItem('role');
    return role ? Promise.resolve(role) : Promise.reject();
}

Since the user was not logged in so localStorage.role was never initialised.

Changed it to:

if (type === AUTH_GET_PERMISSIONS) {
    const role = localStorage.getItem('role');
    return role ? Promise.resolve(role) : Promise.resolve('guest');
}