export declare const INVITE_ONLY_SIGNUP_CODE = "INVITE_ONLY";
export declare function isBootstrapAdmin(email: string): boolean;
export declare function isSignupAdmitted(user: {
    email?: string | null;
    emailVerified?: boolean | null;
}): Promise<boolean>;
export declare function enforceSignupAdmission(user: {
    email?: string | null;
    emailVerified?: boolean | null;
}, context?: {
    path?: string | null;
} | null): Promise<void>;