Embedding structs in golang gives error "unknown field"

i have a struct in user package called account

type Account struct {
	Tp          string `json:"type"bson:"type"`
	AccountId   string  `json:"account_id"bson:"account_id"`
	Credentials map[string]interface{} `json:"credentials,omitempty"bson:"credentials,omitempty"`
	ProfilePicture string `json:"profile_picture,omitempty"`
	Username string `json:"username"bson:"username"`
	AccessToken map[string]interface{}`bson:"access_token,omitempty"`
}

and in user/accounts im trying to embed this account struct into another struct

type returnAccount struct {
	user.Account
	AccessToken string `json:"access_token,omitempty"`
}

user package is properly imported before trying to embed i was using it successfully

finaly in a loop i am getting user accounts and making a map of returnAccount and returning from my function
here is my function

func getAccounts(usr *user.AuthenticatedUser, id ...string) (accounts map[string]returnAccount) {
	accounts = make(map[string]returnAccount)
	if len(id) > 0 {
		for _, v := range id {
			for _, acnt := range usr.Accounts {
				if acnt.AccountId == v {
					accounts[acnt.AccountId] = returnAccount{
						Tp:       acnt.Tp,
						AccountId:acnt.AccountId,
					}
				}
			}
		}
		return
	}
	for _, v := range usr.Accounts {
		accounts[v.AccountId] = returnAccount{
			Tp:       v.Tp,
			AccountId:v.AccountId,
			Username: v.Username,

		}

	}
	return
}

However this code wont compile here is the error message

# sgin/api/user/accounts
api/user/accounts/getaccounts.go:16: unknown returnAccount field 'Tp' in struct literal
api/user/accounts/getaccounts.go:17: unknown returnAccount field 'AccountId' in struct literal
api/user/accounts/getaccounts.go:26: unknown returnAccount field 'Tp' in struct literal
api/user/accounts/getaccounts.go:27: unknown returnAccount field 'AccountId' in struct literal
api/user/accounts/getaccounts.go:28: unknown returnAccount field 'Username' in struct literal

everything seems pretty straightforward and simple i cannot figure out why i get this error all members i need to reach of the Account struct are exported

The reason why i need this field is i want to send access token to clients through api but not the secret and also i want to reduce the indention level

You can't initialize the fields in the embedded type directly, but you can do it like this:

accounts[v.AccountId] = returnAccount{
	Account: Account{
		Tp:        v.Tp,
		AccountId: v.AccountId,
		Username:  v.Username,
	},
}

Or, if v is of type Account, you can just use

accounts[v.AccountId] = returnAccount{
	Account: v,
}

You are trying to initialize promoted fields which is not possible by composite literals. From Go spec:

> A field or method f of an anonymous field in a struct x is called promoted if x.f is a legal selector that denotes that field or method f.
>
>Promoted fields act like ordinary fields of a struct except that they cannot be used as field names in composite literals of the
> struct.

But you can access them using dot notation:

ra:= returnAccount{}
ra.Tp = acnt.Tp