fronted: login

back/context/PhotoContext.cs

@@ -162,36 +162,71 @@ public class PhotoContext : DbContext
 
     public async Task<PhotoModel?> GetById(Guid id) 
     {
-        return await Photos.FindAsync(id);
+        try
+        {
+            return await Photos.FindAsync(id);
+        }
+        catch 
+        {
+            return null;
+        }
     }
 
     public async Task<int> GetTotalItems() 
     {
-        return await Photos.CountAsync();
+        try
+        {
+            return await Photos.CountAsync();
+        }
+        catch 
+        {
+            return 0;
+        }
     }
 
-    public async Task<IEnumerable<PhotoModel>> GetPage(int page = 1, int pageSize = 20) 
+    public async Task<IEnumerable<PhotoModel>?> GetPage(int page = 1, int pageSize = 20) 
     {
         if (page < 1) page = 1;
         if (pageSize < 1) pageSize = 20;
-
-        return await Photos
+        try
+        {
+            return await Photos
             .OrderByDescending(p => p.CreatedAt)
             .Skip((page - 1) * pageSize)
             .Take(pageSize)
             .ToListAsync();
+        }
+        catch 
+        {
+            return null; 
+        }
     }
 
     public async Task<bool> Exists(PhotoModel? photo)
     {
-        if (photo == null) return false;
-        if (string.IsNullOrEmpty(photo.Id)) return false;
-        return await Photos.AnyAsync(p => p.Id == photo.Id);
+        try 
+        {
+            if (photo == null) return false;
+            if (string.IsNullOrEmpty(photo.Id)) return false;
+            return await Photos.AnyAsync(p => p.Id == photo.Id);
+        }
+        catch 
+        {
+            return false; // Handle exceptions gracefully
+        }
     }
 
     public async Task<bool> Exists(string id)
     {
-        return await Photos.AnyAsync(p => p.Id == id);
+        try 
+        {
+            if (string.IsNullOrEmpty(id)) return false;
+            return await Photos.AnyAsync(p => p.Id == id);
+        }
+        catch 
+        {
+            return false; // Handle exceptions gracefully
+        }
     }
 
     public async Task Delete(PhotoModel photo)