i’m trying to a Login controller in C# .Net Api but i keep getting error 400 Bad Requested and when tested in Postman i get the error Value cannot be null. (Parameter ‘s’)

This is the code.

Frontend Thunk (not sure if relevant)

export const loginUser = createAsyncThunk(
“account/Login”,
async ({ username, password }: { username: string; password: string }) => {
const response = await fetch(${API_BASE_URL}/api/account/login, {
method: “POST”,
headers: {
“Content-Type”: “application/json”,
},
body: JSON.stringify({ Username: username, Password: password }),
});

if (!response.ok) {
  const errorData = await response.json();
  throw new Error(`Failed to login: ${errorData.message}`);
}

const data = await response.json();

return data;

}
);

My Controller

   [HttpPost("login")]
    public async Task<IActionResult> Login([FromBody] LoginModel account)
    {
        try
        {
            if (account == null || string.IsNullOrEmpty(account.Password))
            {
                return BadRequest("Invalid request");
            }

            var user = await _context.Account.FirstOrDefaultAsync(a => a.Username == account.Username);
            if (user == null)
            {
                return BadRequest("Invalid username or password.");
            }

            if (!BCrypt.Net.BCrypt.Verify(account.Password, user.Password))
            {
                return Unauthorized("Invalid password");
            }

            var token = GenerateJwtToken(user);
            return Ok(new { token = token });;
        }
        catch (Exception ex)
        {
            return BadRequest(ex.Message);
        }
    }   

My Login Model

namespace Server.AstralApi.api.Models
{
public class LoginModel
{
public required string Username { get; set; }
public required string Password { get; set; }
}
}

Rewrite the controller, verify the Model, and when the data it send from frontend it does have values