declare function authorizationScheme(request: Request): string;
declare function requestUsesHeaderCredentials(request: Request): boolean;
declare function readBearerToken(request: Request): string | null;
declare function readBasicCredentials(request: Request): {
    username: string;
    password: string;
} | null;
export { authorizationScheme, readBasicCredentials, readBearerToken, requestUsesHeaderCredentials };