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IONOS Java SDK for Amazon S3 Compatible Cloud Storage

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package com.ionoscloud.s3.credentials;

/**
 * Definition of credential provider. Provider always gives a valid, non-expired credentials to be
 * used to perform S3 operations. Credential consumer like {@link com.ionoscloud.s3.ApiClient} calls
 * {@link #fetch()} to get credentials. It is provider's responsibility to retrieve credentials upon
 * expiry when {@link #fetch()} is called.
 */
public interface Provider {
  /**
   * Returns a valid {@link Credentials} instance by retrieving from credential provider service if
   * neccessary.
   */
  Credentials fetch();
}