code: public static AWSCredentialsProvider getInstance(final String credentialAccessKey, final String credentialSecretKey,
                                                       final Resource credentialPropertiesFile) {
          return getInstance(credentialAccessKey, credentialSecretKey, credentialPropertiesFile, null, null);
      }
docs: Gets instance.
  
  @param credentialAccessKey      the credential access key
  @param credentialSecretKey      the credential secret key
  @param credentialPropertiesFile the credential properties file
  @return the instance