Return TeamDto instead of Team model for API.

EntityFrameworkCore.API/Controllers/TeamsController.cs

@@ -23,9 +23,22 @@ namespace EntityFrameworkCore.API.Controllers
 
         // GET: api/Teams
         [HttpGet]
-        public async Task<ActionResult<IEnumerable<Team>>> GetTeams()
+        public async Task<ActionResult<IEnumerable<TeamDto>>> GetTeams()
         {
-            return await _context.Teams.ToListAsync();
+            if (_context.Teams == null)
+            {
+                return NotFound();
+            }
+
+            var teams = await _context.Teams
+                .Select(t => new TeamDto
+                {
+                    Id = t.Id,
+                    Name = t.Name,
+                    CoachName = t.Coach.Name
+                })
+                .ToListAsync();
+            return teams;
         }
 
         // GET: api/Teams/5

EntityFrameworkCore.API/Models/TeamDto.cs

@@ -0,0 +1,8 @@
+namespace EntityFrameworkCore.API;
+
+public class TeamDto
+{
+  public int Id { get; set; }
+  public string Name { get; set; }
+  public string CoachName { get; set; }
+}