export interface JwtPayload {
    sub: string;
    email: string;
    plan: string;
    iat: number;
    exp: number;
}
export declare function signAccessToken(userId: string, email: string, plan: string, secret: string): string;
export declare function verifyAccessToken(token: string, secret: string): JwtPayload;
export declare function generateRefreshToken(): string;
export declare function refreshTokenExpiresAt(): string;
export declare function generateMagicToken(): string;
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