Добавьте файлы проекта.

src/Massenger.Server/Controllers/UsersController.cs

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+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.EntityFrameworkCore;
+using Massenger.Server.Data;
+using Massenger.Server.Infrastructure;
+using Massenger.Shared;
+
+namespace Massenger.Server.Controllers;
+
+[ApiController]
+[Authorize]
+[Route("api/[controller]")]
+public sealed class UsersController(
+    MassengerDbContext dbContext,
+    PresenceTracker presenceTracker) : ControllerBase
+{
+    [HttpGet("me")]
+    public async Task<ActionResult<UserSummaryDto>> GetMe(CancellationToken cancellationToken)
+    {
+        var userId = User.GetRequiredUserId();
+        var user = await dbContext.Users.SingleAsync(x => x.Id == userId, cancellationToken);
+        return Ok(user.ToDto(presenceTracker));
+    }
+
+    [HttpGet("search")]
+    public async Task<ActionResult<IReadOnlyList<UserSummaryDto>>> Search([FromQuery] string? q, CancellationToken cancellationToken)
+    {
+        var userId = User.GetRequiredUserId();
+        var query = q?.Trim();
+
+        var usersQuery = dbContext.Users.Where(x => x.Id != userId);
+        if (!string.IsNullOrWhiteSpace(query))
+        {
+            var normalized = query.ToUpperInvariant();
+            usersQuery = usersQuery.Where(x =>
+                x.NormalizedUsername.Contains(normalized) ||
+                EF.Functions.Like(x.DisplayName, $"%{query}%"));
+        }
+
+        var users = await usersQuery
+            .OrderBy(x => x.DisplayName)
+            .Take(25)
+            .ToListAsync(cancellationToken);
+
+        return Ok(users.Select(x => x.ToDto(presenceTracker)).ToList());
+    }
+}