In the following example, would the public properties be considered Dependencies/Collaborators

Question

In the code sample below. Would UserId, Email, and UserType be considered "dependencies" with respect to the ChangeEmail method? would they be considered "collaborators"? Is it a condition for a member to be of a complex type for it to be considered either?

public class User
{
    public int UserId { get; private set; }
    public string Email { get; private set; }
    public UserType Type { get; private set; }
    public void ChangeEmail(int userId, string newEmail)
    {
        object[] data = Database.GetUserById(userId);
        UserId = userId;
        Email = (string)data[1];
        Type = (UserType)data[2];
        
        if (Email == newEmail)
        return;

        object[] companyData = Database.GetCompany();
        string companyDomainName = (string)companyData[0];
        int numberOfEmployees = (int)companyData[1];
        
        string emailDomain = newEmail.Split('@')[1];
        bool isEmailCorporate = emailDomain == companyDomainName;
        UserType newType = isEmailCorporate ? UserType.Employee : UserType.Customer;
        if (Type != newType)
        {
            int delta = newType == UserType.Employee ? 1 : -1;
            int newNumber = numberOfEmployees + delta;
            Database.SaveCompany(newNumber);
        }
        Email = newEmail;
        Type = newType;
        Database.SaveUser(this);
        MessageBus.SendEmailChangedMessage(UserId, newEmail);
    }
}
public enum UserType
{
    Customer = 1,
    Employee = 2
}

Answer 1

This heart of this question is the definition of these terms. So lets dig up some definitions.

Dependency (computer science) or coupling,
a state in which one object uses a function of another object

wikipedia.org - Dependency

Collaborators
(other classes) with which this class interacts to fulfill its responsibilities

wikipedia.org - Class Responsibility Collaboration Card

Given that the usual way classes interact is through methods (which is a fancy name for a particular kind of function) it's easy to see these terms as meaning the same thing. However, they are not typically mixed together in the same literature. When I hear one mentioned vs the other it mostly tells me which books the speaker has been reading.