Index: iknow-api/Repository/Implementations/UserRepository.cs
===================================================================
--- iknow-api/Repository/Implementations/UserRepository.cs	(revision cab02ada65fcd8feda776e5afc86a355f29c7f96)
+++ iknow-api/Repository/Implementations/UserRepository.cs	(revision b38c39caa5327b5c3dffc7da82ccae5b655835fa)
@@ -25,7 +25,11 @@
         }
         
-        public async Task<User> GetUserByIdAsync(int id)
+        public async Task<User?> GetUserByIdAsync(int id)
         {
-            return await _context.User.FirstOrDefaultAsync(u => u.Id == id);
+            return await _context.User
+                .Include(u => u.ContactInfo)
+                .Include(u => u.EnrollmentInfo)
+                .Include(u => u.HighSchool)
+                .FirstOrDefaultAsync(u => u.Id == id);
         }
 
@@ -36,4 +40,19 @@
             await _context.SaveChangesAsync();
         }
+        public async Task AddContactAsync(ContactInfo contactInfo)
+        {
+            _context.ContactInfo.Add(contactInfo);
+            await _context.SaveChangesAsync();
+        }
+        public async Task AddEnrollmentAsync(EnrollmentInfo enrollment)
+        {
+            _context.EnrollmentInfo.Add(enrollment);
+            await _context.SaveChangesAsync();
+        }   
+        public async Task AddHighSchoolAsync(HighSchool highSchool)
+        {
+            _context.HighSchool.Add(highSchool);
+            await _context.SaveChangesAsync();
+        }       
 
         public async Task<int> GetUsersCountAsync()