feat: add getConfiguration method to Auth0Client and updated documentation

[gyaneshgouraw-okta]

Summary

Adds a getConfiguration() method to the auth0-react SDK that exposes the Auth0 domain and clientId configuration values. This method delegates to the underlying Auth0Client.getConfiguration() from @auth0/auth0-spa-js.

Developers need programmatic access to the SDK configuration they provided during initialization. Without this, developers must manually track domain and clientId values separately, leading to:

• Duplication of configuration values
• Potential inconsistencies
• Extra boilerplate for building custom Auth0-related URLs

Changes

New Feature

• getConfiguration() - Returns a readonly object containing { domain, clientId } from the SDK initialization

Usage

With useAuth0 hook

import { useAuth0 } from '@auth0/auth0-react';

const MyComponent = () => {
  const { getConfiguration } = useAuth0();
  const config = getConfiguration();

  console.log(config.domain);   // 'tenant.auth0.com'
  console.log(config.clientId); // 'abc123'
};

With withAuth0 HOC

import { withAuth0, WithAuth0Props } from '@auth0/auth0-react';

class MyComponent extends Component<WithAuth0Props> {
  render() {
    const config = this.props.auth0.getConfiguration();
    return <div>Domain: {config.domain}</div>;
  }
}

export default withAuth0(MyComponent);

Test Plan

• Existing tests pass (102 tests)
• 100% code coverage maintained
• New relevant tests added:
• Lint passes
• Build succeeds

Breaking Changes

None. This is a purely additive change.