export declare class ExtractClientCredentials {
    static readonly PERSONAL_ACCESS_TOKEN_PREFIX = "fn_u_";
    static formatPersonalAccessToken(clientId: string, clientSecret: string): string;
    static fromHeaders(headers: Record<string, unknown> | undefined | null): {
        clientId: string;
        clientSecret: string;
    } | null;
    static parsePersonalAccessToken(token: string): {
        clientId: string;
        clientSecret: string;
    } | null;
}