/**
 * this file is modified from the default to work with Scale's authentication
 * scheme: basic auth, where the username is the API key and the password is "".
 */
export declare type BearerToken = string;
export declare const BearerToken: {
    toAuthorizationHeader: (apiKey: BearerToken | undefined) => string | undefined;
    fromAuthorizationHeader: (header: string) => BearerToken;
};