userid

I am working on website that allows people to create profiles online. I was wondering if it is the right choice to use MySQL AUTO_INCREMENT ed IDs as my user ids. Also bearing in mind that I might have to duplicate the database across multiple servers one day? e.g. would you use this method for userIds on a website like Twitter or Facebook? I have tried generating userIds with PHP before. I used something like this: function generateID() { $possible = "1234567890"; $code = ""; $characters = mt_rand(7,14); $i = 0; while ($i < $characters) { $code .= substr($possible, mt_rand(0, strlen($possible

Given a email address, is it possbile to get userID of a person? For example, If I have a variable email that has email of the person. Can I get their ID by doing something like String userID = mAuth.DatabaseReference.getuID.(email); Sorry if this a stupid question. Edit: note, I am looking to get ID of a person who is not the current user. So I can't use FirebaseUser user = mAuth.getCurrentUser(); The structure of my database looks like this, so the ID will be stored in database already. I just need a way of getting it (In the diagram presented below I don't have a field of email but I will

How can we check whether the USERID exists in Active Directory or not. I have LDAP String and UserID, can I find whether that UserID exists in Active Directory or not. I am using this for ASP.NET Web Application (.NET 3.5) You can do something along the lines of (replacing domain with the domain you're authenticating against or removing the parameter altogether): public bool DoesUserExist(string userName) { using (var domainContext = new PrincipalContext(ContextType.Domain, "DOMAIN")) { using (var foundUser = UserPrincipal.FindByIdentity(domainContext, IdentityType.SamAccountName, userName)) {

Every time my app is updated from the App Store some small number of the users get a new identifierForVendor for some reason. My users don't sign up or login. They are all anonymous so I need to separate them through their vendor IDs. I've considered that there could've been insufficient space on some devices, resulting in the app being deleted and reinstalled, but that's not the case since in the last update a friend of mine had over 2GB of empty space. I know that the identifierForVendor is changed for a user who deletes and reinstalls the app. But that's not the case here, as the app is

For the next version of our application, I want to change the sharedUserId since we now use an internal control dashboard app which must write to the other app's settings files. But since the app is already installed on many phones, will this be a problem? I ran a little test on the emulator, and I'm seeing exceptions in the device logs that *.bak versions of the preference files cannot be written. Not sure how critical that is. Curiously, safing settings still seems to work, even though the shared_prefs folder had been created using another Linux user ID. Did anyone try this before? And to