add Todo and add findByEmail for later use in UserRepository.java

server/src/main/java/com/mixel/docusphere/entity/User.java

@@ -42,6 +42,7 @@ public class User implements UserDetails {
     @Column(name = "updated_at", nullable = false)
     private LocalDateTime updatedAt;
 
+    // TODO: I think this can be removed since the same logic is already done by @CreationTimestamp annotation
     @PrePersist
     protected void onCreate() {
         createdAt = LocalDateTime.now();

server/src/main/java/com/mixel/docusphere/repository/UserRepository.java

@@ -2,7 +2,11 @@ package com.mixel.docusphere.repository;
 
 import com.mixel.docusphere.entity.User;
 import org.springframework.data.jpa.repository.JpaRepository;
+
+import java.util.Optional;
 import java.util.UUID;
 
 public interface UserRepository extends JpaRepository<User, UUID> {
+
+    Optional<User> findByEmail(String email);
 }