Function parseAuthentication

Returns {
    authentication: {
        basicAuth?: { enabled: boolean; passwdFile: string; realm?: string };
        oauth2?: {
            authorizationUrl: string;
            clientId: string;
            enabled: boolean;
            provider?: string;
            redirectPath: string;
            scopes?: string[];
            tokenUrl: string;
            userinfoUrl?: string;
        };
    };
}