added methods

src/main/java/mate/academy/service/AuthenticationService.java

@@ -1,6 +1,9 @@
 package mate.academy.service;
 
+import mate.academy.model.User;
+
 public class AuthenticationService {
+    private UserService userService = new UserService();
     /**
      * Imagine that some user wants to login to your site.
      * You should check if user credentials (login and password) are valid or not.
@@ -10,7 +13,9 @@ public class AuthenticationService {
      * @return true if user by email exists and passed password is equal to user's password.
      * Return false in any other cases.
      */
+
     public boolean login(String email, String password) {
-        return false;
+        User user = userService.findByEmail(email);
+        return user != null && user.getPassword().equals(password);
     }
 }

src/main/java/mate/academy/service/UserService.java

@@ -3,18 +3,27 @@
 import mate.academy.model.User;
 
 public class UserService {
-    private static final User[] users = new User[] {
+    static final User[] users = new User[] {
             new User("[email protected]", "1234"),
             new User("[email protected]", "1234")
     };
 
     /**
      * Find user by email. All users are stored in <code>private static final User[] users</code>
-     * @param email - the input parameter
+     * @parameter email - the input parameter
      * @return - user if his email is equal to passed email.
      * Return <code>null</code> if there is no suitable user
      */
+    public User[] getUsers() {
+        return users;
+    }
+
     public User findByEmail(String email) {
+        for (User user : users) {
+            if (user.getEmail().equals(email)) {
+                return user;
+            }
+        }
         return null;
     }
 }