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Client and messages for communicating with the Nedap Retail APIs

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package com.nedap.retail.messages;

import javax.ws.rs.client.ResponseProcessingException;

public interface IAccessTokenResolver {

    /**
     * Login with Nedap OAuth 2.0 Authorization Server.
     * 
     * @return OAuth 2.0 access token
     * @throws ClientException - if the status of the HTTP response is greater than or equal to 300 and c is not the
     *             type ClientResponse.
     * @throws ResponseProcessingException - if the client handler fails to process the request or response.
     */
    public String resolve();
}