export declare function normalizeGitHubUsername(value: string | undefined): string | undefined;
export declare function extractGitHubUsernameFromEmail(email: string | undefined): string | undefined;
export declare function resolveGitHubUsername(options: {
    githubLogin?: string;
    email?: string;
}): string | undefined;
export declare function toGitHubProfileUrl(username: string | undefined): string | undefined;