Mismatch data type for function get at argument index 1 expected data type BIGINT found dataType STRING line 3

Mismatch data type for function get at argument index 1 expected data type BIGINT found dataType STRING line 3

smstextStr=input.smstextId.toString();
smstextDetails = zoho.crm.getRecords("CustomModule 16",input.smstextId.toLong());
donottext = ifnull(smstextDetails.get("Email Out Out"), "");
mp=map();
mp.put("DO NOT TEXT",donottext);
updateResp = zoho.crm.updateRecord("Contacts",studentsStr,mp);
info updateResp;