/**
 * This lambda verifies authorization header against static basic auth credentials saved in Secrets
 * Manager.
 *
 * Expects the following environment variables:
 * - CREDENTIALS_SECRET_NAME
 *   - Name of secret in AWS Secrets Manager that stores basic auth credentials. See
 *     `BasicAuthAuthorizerProps` on the `ApiGateway` construct for the supported formats.
 */
import { SecretsManager } from "@aws-sdk/client-secrets-manager";
import type { APIGatewayRequestAuthorizerEventV2, APIGatewaySimpleAuthorizerResult } from "aws-lambda";
type AuthorizerResult = APIGatewaySimpleAuthorizerResult & {
    /**
     * Returning a context object from our authorizer allows our API Gateway to access these variables
     * via `${context.authorizer.<property>}`.
     * https://docs.aws.amazon.com/apigateway/latest/developerguide/http-api-parameter-mapping.html
     */
    context?: {
        /**
         * If the request's credentials are verified, we return the username that was used in this
         * context variable (named `authorizer.username`). We use this to include the requesting user in
         * the API Gateway access logs (see `defaultAccessLogFormat` in our `ApiGateway` construct). You
         * can also use this when mapping parameters to the backend integration (see
         * `AlbIntegrationProps.mapParameters` on the `ApiGateway` construct).
         */
        username: string;
    };
};
export declare const handler: (event: APIGatewayRequestAuthorizerEventV2) => Promise<AuthorizerResult>;
/** For overriding dependency creation in tests. */
export declare const dependencies: {
    createSecretsManager: () => SecretsManager;
};
export declare function clearCache(): void;
export {};