export interface StoredCredentials {
    refreshToken: string;
    accessToken: string;
    /** Epoch milliseconds at which accessToken stops being valid. */
    expiresAt: number;
}
export declare function defaultBaseDir(): string;
export declare function credentialsPath(baseDir?: string): string;
export declare function readCredentials(environment: string, baseDir?: string): StoredCredentials | null;
export declare function writeCredentials(environment: string, credentials: StoredCredentials, baseDir?: string): void;
export declare function clearCredentials(environment: string, baseDir?: string): void;
export declare function readDefaultEnvironment(baseDir?: string): string | undefined;
export declare function writeDefaultEnvironment(environment: string, baseDir?: string): void;