Golang Rethinkdb nested filter

I am trying to run a filter on a property of a nested object for RethinkDB in Golang. But I am sure that I am missing something here.

This is the error I am getting:

> (func literal).Eq undefined (type func(gorethink.Term) gorethink.Term has no field or method Eq)

Here is my code:

type User struct {
	Id        string `json:"id,omitempty"`
	FirstName string `json:"firstName,omitempty"`
	LastName  string `json:"lastName,omitempty"`
	Email     string `json:"email,omitempty"`
	Password  string `json:"password,omitempty"`
	Salt      string `json:"salt,omitempty"`
}

type UnverifiedUserRequest struct {
	Id    string `json:"id,omitempty"`
	Token string `json:"token,omitempty"`
	User  User   `json:"user,omitempty"`
}

db.Table("unverified_requests").Filter(func(row r.Term) r.Term {
    return row.Field("user").Map(func(user r.Term) r.Term {
	    return user.Field("email")
	}.Eq(email))
}).Run(session)

UPDATE 1

After making changes as suggested by @icza, the program builds fine. But I am getting the following error at runtime:

> gorethink: Cannot convert OBJECT to SEQUENCE in: r.DB("uc_dev").Table("unverified_requests").Filter(func(var_‌​5 r.Term) r.Term { return var_5.Field("user").Map(func(var_6 r.Term) r.Term { return var_6.Field("email") }).Eq("myemail@gmail.com") })

A misplaced parenthesis. Instead of }.Eq(email)) use }).Eq(email):

db.Table("unverified_requests").Filter(func(row r.Term) r.Term {
    return row.Field("user").Map(func(user r.Term) r.Term {
        return user.Field("email")
    }).Eq(email)
}).Run(session)

You tried to call Eq() on the function literal argument that is passed to Map(). It is obviously not of type gorethink.Term, but the return value of gorethink.Map() is, so call Eq() on the reutrn value of Map(), which means put the .Eq() after the parenthesis that closes the method call Map().