Merge remote-tracking branch 'origin/15-userdatabase-and-user' into 15-userdatabase-and-user

Author: Madhavan7

src/main/java/User.java

@@ -1,5 +1,5 @@
 import java.io.Serializable;
-public abstract class User implements Serializable{
+public abstract class User implements Serializable, Changeable{
     protected String username;
     protected String password;
     protected String email;
@@ -20,4 +20,16 @@ private String getPassword(){
         return this.password;
     }
 
+    @Override
+//    from Changeable
+    public void changeFeature(String feature, String newFeature){
+        if (feature == "Username"){
+            this.username = newFeature;
+        } else if (feature == "Password"){
+            this.password = newFeature;
+        } else if (feature == "Email"){
+            this.email = newFeature;
+        }
+    }
+
 }

src/main/java/UserDatabase.java

@@ -25,6 +25,7 @@ public boolean UserExists(String username, String email) {
         }
         return user != null;
     }
+//    TODO: create userExists that takes 1 parameter: username.
 
     // Creates a new user with a username and password, and an email address
     // The order is username, password, email address, verification status, status