added getGroupMembers method

lib/jira.js

@@ -1916,5 +1916,69 @@ var JiraApi = exports.JiraApi = function(protocol, host, port, username, passwor
             callback(response.statusCode + ': Error while retrieving backlog');
         });
     };
+// ## Get de users of a group ##
+    // ### Takes ###
+    // *  group: group name
+    // *  callback: for when it's done
+    //
+    // ### Returns ###
+    // *  error string
+    // *  users object
+    /*
+     Users item is in the format:
+    {
+      "name": "jira-developers",
+      "self": "https://localhost:8443/rest/api/2/group?groupname=jira-developers",
+      "users": {
+        "size": 1,
+        "items": [
+          {
+            "self": "https://localhost:8443/rest/api/2/user?username=someone",
+            "name": "someone",
+            "emailAddress": "someone@localhost.com",
+            "avatarUrls": {
+              "48x48": "https://localhost:8443/secure/useravatar?ownerId=someone&avatarId=10302",
+              "24x24": "https://localhost:8443/secure/useravatar?size=small&ownerId=someone&avatarId=10302",
+              "16x16": "https://localhost:8443/secure/useravatar?size=xsmall&ownerId=someone&avatarId=10302",
+              "32x32": "https://localhost:8443/secure/useravatar?size=medium&ownerId=someone&avatarId=10302"
+            },
+            "displayName": "Someone People",
+            "active": true
+          }
+        ],
+        "max-results": 50,
+        "start-index": 0,
+        "end-index": 0
+      },
+      "expand": "users"
+    }
+     */
+    this.getGroupMembers = function(group,maxResults,startIndex,endIndex, callback) {
+      startIndex = (startIndex !== undefined) ? startIndex : 0;
+      endIndex = (endIndex !== undefined) ? endIndex : 50
+      maxResults = (maxResults !== undefined) ? maxResults : 50;
+        var options = {
+            rejectUnauthorized: this.strictSSL,
+            uri: this.makeUri('/group?groupname='+group
+              +'&expand=users['+startIndex+':'+endIndex+']'
+              +'&maxResults='+maxResults),
+            method: 'GET',
+            json: true
+        };
+        console.log(options);
+        this.doRequest(options, function(error, response) {
+            if (error) {
+                callback(error, null);
+                return;
+            }
+
+            if (response.statusCode === 200) {
+                callback(null, response.body);
 
+                return;
+            }
+
+            callback(response.statusCode + ': Error while retrieving users');
+        });
+    };
 }).call(JiraApi.prototype);