[SDK][NEW API] Cards Get Token

[nahwinrajan]

In regards with cards new API and documentation update we will need new method of Token.getToken on xendit-java client library.

This issue is request for it.

Xendit.apiKey = "xnd_development_P4qDfOss0OCpl8RtKrROHjaQYNCk9dN5lSfk+R1l9Wbe+rSiCwZ3jw==";
try {
  CreditCardToken creditCardToken = Token.getToken("605c05d3f81fa60011b2fa4e");
} catch (XenditException e) {
  e.printStackTrace();
}