I tried to generate the token from login request.It is successful in postman tool and success in soapui groovy script.But I couldnot do via rest assured library.Below are the screenshot where the request uses Body - form-data with username and password.

I have tried the using queryparams, formparam but getting the below error.Kindly help me to solve the error.
<html>
<head><title>301 Moved Permanently</title></head>
<body bgcolor="white">
<center><h1>301 Moved Permanently</h1></center>
<hr><center>nginx/1.4.4</center>
</body>
</html>
Rest assured code:
Map<String, String> formParams = new HashMap<>();
formParams.put("username", "test");
formParams.put("password", "welcome");
Response response = RestAssured.given().config(RestAssured.config().redirect(redirectConfig().followRedirects(false)).encoderConfig(EncoderConfig.encoderConfig().encodeContentTypeAs("multipart/form-data", ContentType.TEXT)))
.queryParams(formParams)
.post("http://posturl");