code: public AccessTokenInfo validateAccessToken(AuthleteApi api, String accessToken) throws WebApplicationException
      {
          return validateAccessToken(api, accessToken, null, null, null);
      }
docs: Validate an access token. This method is an alias of {@link
  #validateAccessToken(AuthleteApi, String, String[], String, String)
  validateAccessToken}<code>(api, accessToken, null, null, null)</code>.
  
  @param api
  Implementation of {@link AuthleteApi} interface.
  
  @param accessToken
  An access token to validate.
  
  @return
  Information about the access token.
  
  @throws WebApplicationException
  The access token is invalid. To be concrete, the access
  token does not exist or it has expired.