Add getUser method and User.AvatarUrl property

Author: thomaslevesque

Git.hub/Client.cs

@@ -148,6 +148,19 @@ public User getCurrentUser()
             return user.Data;
         }
 
+        public User GetUser(string userName)
+        {
+            if (string.IsNullOrEmpty(userName))
+            {
+                throw new ArgumentException("Empty username", nameof(userName));
+            }
+
+            var request = new RestRequest($"/users/{userName}");
+
+            var user = client.Get<User>(request);
+            return user.Data;
+        }
+
         /// <summary>
         /// Searches through all of Github's repositories, similar to the search on the website itself.
         /// </summary>

Git.hub/User.cs

@@ -7,6 +7,11 @@ public class User
         /// </summary>
         public string Login { get; internal set; }
 
+        /// <summary>
+        /// The avatar URL
+        /// </summary>
+        public string AvatarUrl { get; set; }
+
         public User()
         {
         }