Android token for push (GCM), api ask for 23 charas in I have 162 chars. How convert this: APA91bFkEXgdxKce1HqRTuEiysdAv_GceUDwYirTeGkxLdwp2JxOtgs-J24hFBAadZSfoi18t7IpFUstLB9AXBkH4M-O5fNybqQWX_-mRBwyXaoKszfv31PR6KCX_CHETH4Uvc7eOD2Qjkrl2c8WIs9M4Y4LmgtnBA
for 23 chars ?