c#
[ApiController]
[Route("[controller]")]
public class StudyController : ControllerBase
{
  private readonly Cloudinary _cloudinary;
  private readonly UserManager<User> _userManager;
  private readonly ApplicationDbContext _context;

  public StudyController(
    ApplicationDbContext context,
    UserManager<User> userManager,
    Cloudinary cloudinary
    )
  {
    _context = context;
    _userManager = userManager;
    _cloudinary = cloudinary;
  }

\\ ... 

  [HttpGet("allStudies")]
  public async Task<ActionResult<IEnumerable<StudyPreviewDTO>>> GetAllStudies()
  {

    var user = await _userManager.GetUserAsync(HttpContext.User);
    Console.WriteLine("checking user"); 
    Console.WriteLine(HttpContext.User);  // returns null

c#
[ApiController]
[Route("[controller]")]
public class StudyController : ControllerBase
{
  private readonly Cloudinary _cloudinary;
  private readonly UserManager<User> _userManager;
  private readonly ApplicationDbContext _context;

  public StudyController(
    ApplicationDbContext context,
    UserManager<User> userManager,
    Cloudinary cloudinary
    )
  {
    _context = context;
    _userManager = userManager;
    _cloudinary = cloudinary;
  }

\\ ... 

  [HttpGet("allStudies")]
  public async Task<ActionResult<IEnumerable<StudyPreviewDTO>>> GetAllStudies()
  {

    var user = await _userManager.GetUserAsync(HttpContext.User);
    Console.WriteLine("checking user"); 
    Console.WriteLine(HttpContext.User);  // returns null