/** Minimum password length used across auth forms (matches existing behaviour). */
export declare const AUTH_PASSWORD_MIN_LENGTH = 6;
export declare function validateRequiredEmail(value: string): string | null;
export declare function validateRequiredPassword(value: string): string | null;
export declare function validatePasswordMinLength(value: string, minLength?: number): string | null;
export declare function validatePasswordsMatch(password: string, confirmPassword: string): string | null;
export declare function validateDisplayName(value: string): string | null;
export declare function validateOtpCode(value: string, length?: number): string | null;
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