String c2dmAuth = loginAC2DM();
AndroidCheckinRequest.Builder checkInbuilder = AndroidCheckinRequest.newBuilder(Utils.generateAndroidCheckinRequest());
AndroidCheckinRequest build = checkInbuilder.setId(new BigInteger(this.getAndroidID(), 16).longValue())
.setSecurityToken(new BigInteger(getSecurityToken(), 16).longValue()).addAccountCookie("[" + getEmail() + "]")
.addAccountCookie(c2dmAuth).build();
// this is the second checkin to match credentials with android-id
return postCheckin(build.toByteArray());
}