diff --git a/.vs/VSWorkspaceState.json b/.vs/VSWorkspaceState.json
new file mode 100644
index 000000000..6b6114114
--- /dev/null
+++ b/.vs/VSWorkspaceState.json
@@ -0,0 +1,6 @@
+{
+  "ExpandedNodes": [
+    ""
+  ],
+  "PreviewInSolutionExplorer": false
+}
\ No newline at end of file
diff --git a/.vs/jv-oop-lesson-0/v17/.wsuo b/.vs/jv-oop-lesson-0/v17/.wsuo
new file mode 100644
index 000000000..2f70d25fa
Binary files /dev/null and b/.vs/jv-oop-lesson-0/v17/.wsuo differ
diff --git a/.vs/jv-oop-lesson-0/v17/DocumentLayout.json b/.vs/jv-oop-lesson-0/v17/DocumentLayout.json
new file mode 100644
index 000000000..a9abaa9cb
--- /dev/null
+++ b/.vs/jv-oop-lesson-0/v17/DocumentLayout.json
@@ -0,0 +1,12 @@
+{
+  "Version": 1,
+  "WorkspaceRootPath": "C:\\Users\\sofyh\\Source\\Repos\\jv-oop-lesson-0\\",
+  "Documents": [],
+  "DocumentGroupContainers": [
+    {
+      "Orientation": 0,
+      "VerticalTabListWidth": 256,
+      "DocumentGroups": []
+    }
+  ]
+}
\ No newline at end of file
diff --git a/src/main/java/mate/academy/service/AuthenticationService.java b/src/main/java/mate/academy/service/AuthenticationService.java
index 8f7c7c975..2d6983b02 100644
--- a/src/main/java/mate/academy/service/AuthenticationService.java
+++ b/src/main/java/mate/academy/service/AuthenticationService.java
@@ -1,5 +1,7 @@
 package mate.academy.service;
 
+import mate.academy.model.User;
+
 public class AuthenticationService {
     /**
      * Imagine that some user wants to login to your site.
@@ -10,7 +12,14 @@ 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.
      */
+    private UserService userService = new UserService();
+
+    public UserService getUserService() {
+        return userService;
+    }
+
     public boolean login(String email, String password) {
-        return false;
+        User user = getUserService().findByEmail(email);
+        return user != null && user.getPassword().equals(password);
     }
 }
diff --git a/src/main/java/mate/academy/service/UserService.java b/src/main/java/mate/academy/service/UserService.java
index 1652d7d68..b9701582e 100644
--- a/src/main/java/mate/academy/service/UserService.java
+++ b/src/main/java/mate/academy/service/UserService.java
@@ -14,7 +14,13 @@ public class UserService {
      * @return - user if his email is equal to passed email.
      * Return <code>null</code> if there is no suitable user
      */
+
     public User findByEmail(String email) {
+        for (User user : users) {
+            if (user.getEmail().equals(email)) {
+                return user;
+            }
+        }
         return null;
     }
 }