import type { CognitoJwtPayload } from "@nestjs-cognito/core";
/**
 * Extracts user data from a Cognito JWT payload
 * @param payload The JWT payload
 * @param expectedTokenType Optional token type to validate against
 * @param data The property name(s) to extract
 * @returns The extracted data or the full payload
 * @throws CognitoTokenTypeMismatchError if token type validation fails
 */
export declare function extractCognitoUserData(payload: CognitoJwtPayload | undefined, expectedTokenType?: 'access' | 'id', data?: string | string[]): any;
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