import { NovuCore } from "../core.js";
import { RequestOptions } from "../lib/sdks.js";
import * as components from "../models/components/index.js";
import { ConnectionError, InvalidRequestError, RequestAbortedError, RequestTimeoutError, UnexpectedClientError } from "../models/errors/httpclienterrors.js";
import * as errors from "../models/errors/index.js";
import { NovuError } from "../models/errors/novuerror.js";
import { ResponseValidationError } from "../models/errors/responsevalidationerror.js";
import { SDKValidationError } from "../models/errors/sdkvalidationerror.js";
import * as operations from "../models/operations/index.js";
import { APIPromise } from "../types/async.js";
import { Result } from "../types/fp.js";
/**
 * Upsert provider credentials
 *
 * @remarks
 * Upsert credentials for a provider such as **slack** and **FCM**.
 *       **providerId** is required field. This API creates **deviceTokens** or appends to the existing ones.
 */
export declare function subscribersCredentialsAppend(client: NovuCore, updateSubscriberChannelRequestDto: components.UpdateSubscriberChannelRequestDto, subscriberId: string, idempotencyKey?: string | undefined, options?: RequestOptions): APIPromise<Result<operations.SubscribersV1ControllerModifySubscriberChannelResponse, errors.ErrorDto | errors.ValidationErrorDto | NovuError | ResponseValidationError | ConnectionError | RequestAbortedError | RequestTimeoutError | InvalidRequestError | UnexpectedClientError | SDKValidationError>>;
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