Innovator V12 REST Integration

Hello,

I suppose Innovator V12SP1 supports also REST integration. When I try an example in Postman, it returns the following error;

{
    "error": {
"code": "BadRequest",
        "message": "Value cannot be null.\r\nParameter name: loginName"
    }
}
In "Headers", I've set the AUTHUSER(admin), its MD5 AUTHPASSWORD(607920B64FE136F9AB2389E371852AF2), and DATABASE(InnovatorSolutions12), with the request:
http://localhost:80/innovatorserver12/server/odata/part
So, what is maybe the reason of this error? Thanks for the answer
Best regards
chenze