Renamed function to better reflect it's function

ref #39

src/models/actions/UpdateUser.ts

@@ -85,7 +85,7 @@ export class UpdateUser {
     /**
      * Creates a User entity from this.
      */
-    public async toUser(user: User): Promise<User> {
+    public async updateUser(user: User): Promise<User> {
         user.email = this.email;
         user.username = this.username;
         if (user.email === undefined && user.username === undefined) {