question: public static RefreshTokenCredentials create ( OauthClient oauthConfig , String refreshTokenSecret , String tokenExchangeUrl ) { RefreshRequestFactory requestFactory = new RefreshRequestFactory ( ) ; Clock clock = Clock . systemDefaultZone ( ) ; return new RefreshTokenCredentials ( requestFactory , refreshTokenSecret , tokenExchangeUrl , oauthConfig , clock ) ; }
target:  Create a new set of credentials for the given refresh token and oauth configuration. 