Web API Returns Wrong Values after being Published to IIS - entity-framework

Question

Please help me. The API I created works fine when I launch it with Visual Studio but (the POST methods) has issues I deployed to IIS.
It returns wrong values and sometimes, null values. If i go back to test it in debug mode it works well.
THIS IS WHERE I'M CALLING THE API
try
{
string apiToken = "DEFAULTAPI";
EmployeeObject EmployeeObject = new EmployeeObject()
{
username = "John Doe"
password = "12345"
apiToken = apiToken
};
var emp = JsonConvert.SerializeObject(EmployeeObject);
string url = "http://localhost/PublishVersion/api/Company";
//the url variable holds the published version link
var response = client.PostAsync(url, new StringContent(emp, Encoding.UTF8, "application/json"));
response.Wait();
var result = response.Result;
if (result.IsSuccessStatusCode)
{
Uri employeeUrl = result.Headers.Location;
var statusMessage = result.Content.ReadAsStringAsync().Result;
if (statusMessage == "yes")
{
status = true;
}
else if (statusMessage == "no")
{
status = false;
}
}
return status;
}
AND THIS IS THE API
public string Post([FromBody] Employees employees)
{
string message = "no";
if (employees != null)
{
string emp = employees.username;
string password = employees.password
string apiToken = employees.apiToken
APIToken token = _dbContext.MyTable.Where(x => x.apitoken == apitoken).FirstOrDefault();
//APIToken is a table which has properties company and boss (both string)
if (token != null)
{
string company = token.company;
string boss = token.boss;
return message = "yes" + " " + company + "" + boss;
}
else
{
return message = "invalid token";
}
}
return message + employee.username;
}
The api returns "no John Doe" to the caller, which shouldn't be that way, since it displayed the username value which shows that the employee object is not null. Why doesn't it go into the block of code since it passed the null check? This issue only comes up when I deploy the API project to the IIS (version 10). Works fine in Visual Studio debug mode.
Also, the API and Winsform(where i'm calling it from) are on the same machine.
Thank you.