Problem with API authentication

[AlexeyK]

Hi All,

I have a problem with authentication via api.
When I use the user.login method, authentication does not work every time.
When authenticating through the web, there is no problem.

Zabbix Server 3.0.4

$ cat version
{

"jsonrpc": "2.0",
"method": "apiinfo.version",
"params": [],
"id": 1

$ cat data
{

"jsonrpc": "2.0",
"method": "user.login",
"params": {

"user": "zabbixUser",
"password": "passw0rd"

},
"id": 1

}

$ curl -k -H "Content-Type: application/json-rpc" --data @version zabbix.loc/api_jsonrpc.php
{"jsonrpc":"2.0","result":"3.0.4","id":1}

$ curl -k -H "Content-Type: application/json-rpc" --data @data zabbix.loc/api_jsonrpc.php
{"jsonrpc":"2.0","result":"cb2bc1da4eb53798cc06822 f654be1fe","id":1}
$ curl -k -H "Content-Type: application/json-rpc" --data @data zabbix.loc/api_jsonrpc.php
{"jsonrpc":"2.0","result":"83a840ba160fbe74201ef8f 9e7a90f33","id":1}
$ curl -k -H "Content-Type: application/json-rpc" --data @data zabbix.loc/api_jsonrpc.php
{"jsonrpc":"2.0","result":"3138b9e5431abd93da105d0 cec916cbe","id":1}
$ curl -k -H "Content-Type: application/json-rpc" --data @data zabbix.loc/api_jsonrpc.php
{"jsonrpc":"2.0","error":{"code":-32602,"message":"Invalid params.","data":"Login name or password is incorrect."},"id":1}
$ curl -k -H "Content-Type: application/json-rpc" --data @data zabbix.loc/api_jsonrpc.php
{"jsonrpc":"2.0","error":{"code":-32602,"message":"Invalid params.","data":"Login name or password is incorrect."},"id":1}
$ curl -k -H "Content-Type: application/json-rpc" --data @data zabbix.loc/api_jsonrpc.php
{"jsonrpc":"2.0","result":"dc0b9b69b168457d551a7d2 a316dc582","id":1}
$ curl -k -H "Content-Type: application/json-rpc" --data @data zabbix.loc/api_jsonrpc.php
{"jsonrpc":"2.0","error":{"code":-32602,"message":"Invalid params.","data":"Login name or password is incorrect."},"id":1}
$ curl -k -H "Content-Type: application/json-rpc" --data @data zabbix.loc/api_jsonrpc.php
{"jsonrpc":"2.0","result":"ab2fae78a3f1f758bb0e3a6 6d9a53554","id":1}
$ curl -k -H "Content-Type: application/json-rpc" --data @data zabbix.loc/api_jsonrpc.php
{"jsonrpc":"2.0","error":{"code":-32602,"message":"Invalid params.","data":"Login name or password is incorrect."},"id":1}
$ curl -k -H "Content-Type: application/json-rpc" --data @data zabbix.loc/api_jsonrpc.php
{"jsonrpc":"2.0","error":{"code":-32602,"message":"Invalid params.","data":"Login name or password is incorrect."},"id":1}
$ curl -k -H "Content-Type: application/json-rpc" --data @data zabbix.loc/api_jsonrpc.php
{"jsonrpc":"2.0","result":"f34f455ccb0c3c4fd945724 8d928c06a","id":1}