issues in defining relationship between entities in EntityFramework core code first

Hi Aall,

I am completely new to Entity framework, working on sample app.

Following the .entity framework CodeFirst approach for  asp.net  core web api

we created two entities 

public class Account
    {
        public int AccountId { get; set; }
        public int AccountNumber { get; set; }
        public DateTime CreatedDate { get; set; }
        public DateTime ModifiedDate { get; set; }
        public decimal Balance { get; set; }

        public int AccountTypeId { get; set; }

        public AccountType   AccountType { get; set; }
    }

public class AccountType
    {
        public int AccountTypeId { get; set; }
        public string Type { get; set; }
        public string Name { get; set; }

        public string  Description { get; set; }

        public DateTime CreatedDate { get; set; }
        public DateTime ModifiedDate { get; set; }
        public List<Account> Accounts { get; set; }

    }

These are the two entities to for simulating a bank account

We have created a APi endpint  for  Creating account like below 

[HttpPost]
        public async Task<ActionResult<Account>> CreateAccount(Account account)
        {
            return await _accountService.AddAccountAsync(account);
        }

But the problem is the swagger is showing the parameter like below

{"accountId": 0,"accountNumber": 0,"createdDate": "2021-04-19T04:08:22.058Z","modifiedDate": "2021-04-19T04:08:22.058Z","balance": 0,"accountTypeId": 0,"accountType": {"accountTypeId": 0,"type": "string","name": "string","description": "string","createdDate": "2021-04-19T04:08:22.058Z","modifiedDate": "2021-04-19T04:08:22.058Z","accounts": ["string"
    ]
  }
}

how do I pass only the account details for creation ? because it has both account and accountype fields are present 

am doing anything wrong while defining the relationship between entities.

My intention is to reference the AccountTypeId mentioned in the account  so that it wont insert accountypeid other than in the accountype table

please correct me if I am doing anything wrong 

thanks