Added support for create user API call.

src/main/java/com/messners/gitlab/api/AbstractApi.java

@@ -120,5 +120,32 @@ public abstract class AbstractApi {
 			throws UniformInterfaceException, ClientHandlerException {
 		
 		return (getApiClient().delete(queryParams, url));
-	}	
+	}
+	
+	
+	/**
+	 * 
+	 * @param formData
+	 * @param string
+	 * @param email
+	 * @param required
+	 */
+	protected void addFormParam(Form formData, String name, Object value, boolean required) throws IllegalArgumentException {
+		
+			if (value == null) {
+				
+				if (required) {
+					throw new IllegalArgumentException(name + " cannot be empty or null");
+				}
+				
+				return;
+			}
+			
+			String stringValue = value.toString().trim();
+			if (required && stringValue.length() == 0) {
+				throw new IllegalArgumentException(name + " cannot be empty or null");
+			}
+			
+			formData.add(name, stringValue);		
+	}
 }
\ No newline at end of file

src/main/java/com/messners/gitlab/api/UserApi.java

 package com.messners.gitlab.api;
 
 import java.io.IOException;
+import java.util.List;
 
+import com.messners.gitlab.api.models.ErrorMessage;
 import com.messners.gitlab.api.models.User;
 import com.sun.jersey.api.client.ClientResponse;
+import com.sun.jersey.api.client.GenericType;
+import com.sun.jersey.api.representation.Form;
 
 public class UserApi extends AbstractApi {
 
@@ -11,6 +15,18 @@ public class UserApi extends AbstractApi {
 		super(gitLabApi);
 	}
 	
+
+	/**
+	 * GET /users
+	 * 
+	 * @return
+	 * @throws IOException
+	 */
+	public List<User> getProjects () throws IOException {	
+		 ClientResponse response = get(null, "users");
+		 return (response.getEntity(new GenericType<List<User>>() {}));
+	}
+	
 	
 	/**
 	 * GET /users/:id
@@ -23,4 +39,75 @@ public class UserApi extends AbstractApi {
 		ClientResponse response = get(null, "users", userId);
 		return (response.getEntity(User.class));
 	}
+	
+	
+	/**
+	 * POST /users
+	 * 
+	 * email (required) - Email
+	 * password (required) - Password
+	 * username (required) - Username
+	 * name (required) - Name
+	 * skype (optional) - Skype ID
+	 * linkedin (optional) - Linkedin
+	 * twitter (optional) - Twitter account
+	 * website_url (optional) - Website url
+	 * projects_limit (optional) - Number of projects user can create
+	 * extern_uid (optional) - External UID
+	 * provider (optional) - External provider name
+	 * bio (optional) - User's bio
+	 * admin (optional) - User is admin - true or false (default)
+	 * can_create_group (optional) - User can create groups - true or false
+	 * 
+	 * @param user
+	 * @return
+	 * @throws IOException
+	 */
+	public User createUser (User user, String password, Integer projectsLimit) throws IOException {
+		
+		Form formData = new Form();
+		addFormParam(formData, "email", user.getEmail(), true);
+		addFormParam(formData, "password", password, true);
+		addFormParam(formData, "username", user.getUsername(), true);
+		addFormParam(formData, "name", user.getName(), true);
+		addFormParam(formData, "skype", user.getSkype(), false);
+		addFormParam(formData, "linkedin", user.getLinkedin(), false);
+		addFormParam(formData, "twitter", user.getTwitter(), false);
+		addFormParam(formData, "website_url", user.getWebsiteUrl(), false);
+		addFormParam(formData, "projects_limit", projectsLimit, false);
+		addFormParam(formData, "extern_uid", user.getExternUid(), false);
+		addFormParam(formData, "provider", user.getProvider(), false);
+		addFormParam(formData, "bio", user.getBio(), false);
+		addFormParam(formData, "admin", user.getIsAdmin(), false);
+		addFormParam(formData, "can_create_group", user.getCanCreateGroup(), false);		
+	
+		ClientResponse response = post(formData, "users");
+		if (response.getStatus() != ClientResponse.Status.CREATED.getStatusCode()) {
+			ErrorMessage errorMessage = response.getEntity(ErrorMessage.class);
+			throw new RuntimeException(errorMessage.getMessage());
+		}
+		
+		return (response.getEntity(User.class));
+	}
+	
+	
+	/**
+	 * DELETE /users/:id
+	 * 
+	 * @param userId
+	 */
+	public boolean deleteUser (Integer userId) throws IOException {
+		
+		if (userId == null) {
+			throw new RuntimeException("userId cannot be null");
+		}
+		
+		ClientResponse response = delete(null, "users", userId);
+		return (response.getStatus() == ClientResponse.Status.OK.getStatusCode());		
+	}
+
+
+	public boolean deleteProject (User user)  throws IOException {
+		return (deleteUser(user.getId()));
+	}
 }

src/main/java/com/messners/gitlab/api/models/User.java

@@ -11,13 +11,13 @@ import javax.xml.bind.annotation.XmlRootElement;
 public class User {
 
 	private String bio;
-	private boolean canCreateGroup;
+	private Boolean canCreateGroup;
 	private Integer colorSchemeId;
 	private Date createdAt;
 	private String email;
 	private String externUid;
 	private Integer id;
-	private boolean isAdmin;
+	private Boolean isAdmin;
 	private String linkedin;
 	private String name;
 	private String provider;