How to create a SalesForce 'User' with REST API? - salesforce

Question

I am trying to create a User in SFDC with REST API on Java Client.
Please see my code below and help me to understand why I am getting the error message below:
HTTP Status 400 ::
{
errorCode: "NOT_FOUND"
message: "The requested resource does not exist"
}
CODE:
HttpClient httpClient = new HttpClient();
JSONObject user = new JSONObject();
String userId = null;
try{
user.put("Username", "email#domain.com");
user.put("Alias", "DemoAPI");
user.put("ProfileId", "00e90000000fKXB");
user.put("Email", "email123456#domain.com");
user.put("EmailEncodingKey", "ISO-8859-1");
user.put("LastName", "REST API Test");
user.put("LanguageLocaleKey", "pt_BR");
user.put("LocaleSidKey", "pt_BR");
user.put("TimeZoneSidKey", "America/Sao_Paulo");
PostMethod post = new PostMethod( instanceURL + "/services/data/v29.0/sobjects/User");
post.setRequestHeader("Authorization", "OAuth " + accessToken);
post.setRequestEntity(new StringRequestEntity(user.toString(), "application/json", null));
httpClient.executeMethod(post);
}catch(Exception e){}

Answer 1

I used the Chrome Postman plugin to POST the following:
Note that the resource URL was set to: (I'm assuming you are on AP1 based the the pod identifier in the ProfileId).
https://na5.salesforce.com/services/data/v29.0/sobjects/User
I got the response:
[
{
"message": "Duplicate Username.<br>The username already exists in this or another Salesforce organization. Usernames must be unique across all Salesforce organizations. To resolve, use a different username (it doesn't need to match the user's email address). ",
"errorCode": "DUPLICATE_USERNAME",
"fields": [
"Username"
]
}
]
Which is fine for testing purposes. It would have probably worked with a different username and free licenses.
Please confirm that your PostMethod URL is set to:
https://ap1.salesforce.com/services/data/v29.0/sobjects/User
In particular, check that there is no trailing slash on instanceURL.