private async Task <ClaimsIdentity> GetIdentityAsync(string username, string password, string grantType)
{
var context = new AccountContext(Configuration.GetConnectionString("DefaultConnection"));
var account = await context.GetAccountAsync(username);
if (account != null && grantType == "password" && account.Password == password)
{
return(await Task.FromResult(new ClaimsIdentity(new GenericIdentity(username, "Token"), new Claim[] { })));
}
// Account doesn't exists
return(await Task.FromResult <ClaimsIdentity>(null));
}