import { EndpointParameterInstructions } from "@aws-sdk/middleware-endpoint";
import { Command as $Command } from "@aws-sdk/smithy-client";
import { Handler, HttpHandlerOptions as __HttpHandlerOptions, MetadataBearer as __MetadataBearer, MiddlewareStack } from "@aws-sdk/types";
import { CognitoIdentityClientResolvedConfig, ServiceInputTypes, ServiceOutputTypes } from "../CognitoIdentityClient";
import { MergeDeveloperIdentitiesInput, MergeDeveloperIdentitiesResponse } from "../models/models_0";
export interface MergeDeveloperIdentitiesCommandInput extends MergeDeveloperIdentitiesInput {
}
export interface MergeDeveloperIdentitiesCommandOutput extends MergeDeveloperIdentitiesResponse, __MetadataBearer {
}
/**
 * <p>Merges two users having different <code>IdentityId</code>s, existing in the same
 *          identity pool, and identified by the same developer provider. You can use this action to
 *          request that discrete users be merged and identified as a single user in the Cognito
 *          environment. Cognito associates the given source user (<code>SourceUserIdentifier</code>)
 *          with the <code>IdentityId</code> of the <code>DestinationUserIdentifier</code>. Only
 *          developer-authenticated users can be merged. If the users to be merged are associated with
 *          the same public provider, but as two different users, an exception will be
 *          thrown.</p>
 *          <p>The number of linked logins is limited to 20. So, the number of linked logins for the
 *          source user, <code>SourceUserIdentifier</code>, and the destination user,
 *          <code>DestinationUserIdentifier</code>, together should not be larger than 20.
 *          Otherwise, an exception will be thrown.</p>
 *          <p>You must use AWS Developer credentials to call this API.</p>
 * @example
 * Use a bare-bones client and the command you need to make an API call.
 * ```javascript
 * import { CognitoIdentityClient, MergeDeveloperIdentitiesCommand } from "@aws-sdk/client-cognito-identity"; // ES Modules import
 * // const { CognitoIdentityClient, MergeDeveloperIdentitiesCommand } = require("@aws-sdk/client-cognito-identity"); // CommonJS import
 * const client = new CognitoIdentityClient(config);
 * const command = new MergeDeveloperIdentitiesCommand(input);
 * const response = await client.send(command);
 * ```
 *
 * @see {@link MergeDeveloperIdentitiesCommandInput} for command's `input` shape.
 * @see {@link MergeDeveloperIdentitiesCommandOutput} for command's `response` shape.
 * @see {@link CognitoIdentityClientResolvedConfig | config} for CognitoIdentityClient's `config` shape.
 *
 */
export declare class MergeDeveloperIdentitiesCommand extends $Command<MergeDeveloperIdentitiesCommandInput, MergeDeveloperIdentitiesCommandOutput, CognitoIdentityClientResolvedConfig> {
    readonly input: MergeDeveloperIdentitiesCommandInput;
    static getEndpointParameterInstructions(): EndpointParameterInstructions;
    constructor(input: MergeDeveloperIdentitiesCommandInput);
    /**
     * @internal
     */
    resolveMiddleware(clientStack: MiddlewareStack<ServiceInputTypes, ServiceOutputTypes>, configuration: CognitoIdentityClientResolvedConfig, options?: __HttpHandlerOptions): Handler<MergeDeveloperIdentitiesCommandInput, MergeDeveloperIdentitiesCommandOutput>;
    private serialize;
    private deserialize;
}