import { Context } from 'koa';
import { OpenAPIV3 } from 'openapi-types';
import { Promisable } from 'type-fest';
import { SecurityCheck } from './types';
export declare type GetApiKeyUser<User = unknown, Client = unknown> = (apiKey: string, ctx: Context) => Promisable<User | [User, Client?]>;
/**
 * Get a user based on an apiKey security scheme.
 *
 * @param scheme - The OpenAPI security scheme.
 * @param userGetter - A function for getting a user.
 * @returns A tuple containing just the user.
 */
export declare function apiKeySecurityCheck(scheme: OpenAPIV3.ApiKeySecurityScheme, userGetter: GetApiKeyUser): SecurityCheck;