export declare type AuthorizationHeader = {
    authorization: string;
};
export interface Authenticator {
    getAuthorizationHeader(): Promise<AuthorizationHeader>;
    getInstructionsWhenInvalid(): string;
}
export declare function getBasicAuthorizationHeader(username: string, password: string): AuthorizationHeader;
export declare function getBearerAuthorizationHeader(token: string): AuthorizationHeader;
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