/**
 * Auth Header React Hook
 *
 * Call the hook,
 * to get the auth header for network request
 *
 * **Format: `type token` (authType-space-authToken)**
 *
 * @example
 * Here is a simple example
 * ```jsx
 * import useAuthHeader from 'react-auth-kit/hooks/useAuthHeader'
 *
 * const Component = () => {
 *  const authHeader = useAuthHeader();
 *  const headers = {
 *    'Authorization': authHeader
 *  }
 *  // use the headers in the network request
 *  ...
 * }
 * ```
 *
 * @returns If the user is authenticated,
 * then `'auth.type auth.token'` is returned.
 * If the user is not authenticated, then `null` is returned.
 *
 * @throws AuthError
 * Thrown if the Hook is used outside the Provider Scope.
 */
declare function useAuthHeader(): string | null;
export default useAuthHeader;