/**
 * Represents the authenticated user identity schema.
 */
interface AuthUser {
    /** The unique identifier for the user. */
    id: number;
    /** The display name of the user. */
    name: string;
    /** The primary email address of the user. */
    email: string;
}
/**
 * A Nuxt composable providing authentication states and actions for the `nuxt-crud-table` workspace.
 * Handles token storage, user session persistence, SSR-safe states, and request headers.
 * @example
 * ```ts
 * const { user, isAuthenticated, login, logout } = useNctAuth()
 * ```
 * @returns An object containing reactive authentication state and action utilities.
 */
export declare function useNctAuth(): {
    token: import("vue").Ref<string | null, string | null>;
    user: import("vue").Ref<AuthUser | null, AuthUser | null>;
    isAuthenticated: import("vue").ComputedRef<boolean>;
    authHeaders: import("vue").ComputedRef<Record<string, string>>;
    login: (credentials: Record<string, string>) => Promise<{
        success: boolean;
        error?: undefined;
    } | {
        success: boolean;
        error: string;
    }>;
    register: (registrationDetails: Record<string, string>) => Promise<{
        success: boolean;
        error?: undefined;
    } | {
        success: boolean;
        error: string;
    }>;
    logout: () => Promise<void>;
    fetchUser: () => Promise<void>;
};
export {};