How to do this: LOGIN
Hi! In this list of articles, I’d like to share some daily-basis wisdom about very easy, yet underestimated things that modern managers and owners stumble upon
The first ones get stuck finding the right logic; the others are battling with retention, attraction, and the best UX
Today’s idea: sharing the logic of Login for any website or mobile app. For free
Why Google?
It’s an urgently required thing to get user details and let them into your application
What’s the best way? It seems simple, but I guarantee there are cases you’ve never thought of
Nowadays, the easiest method is just to use Google
Pros:
Cons:
The Verification Checklist: Which method to choose?
But be careful: don’t scare conventional users; it can pop up suddenly and create a "hate factor"
Data Collection: "Start Low and Raise Slow"
When you adjust scopes, you must clearly understand what every piece of info serves. Never take more than you need. This is user privacy and security—they rely on you
The Strategy:
1. Get the Full Name and profile picture
2. Only ask for Age, Gender, or Locale if it's strictly necessary for the core flow
3. If they trust you, you can raise the stakes later
The Profile Picture "Culprit"
Let’s pause here. The logic of fetching it is quite a struggle—but only if you’re not sure what to do
Why do you need it? To show the user they are in control and to create familiarity
What to do? Store it
Where? Here is the logic…
JUST COPY THIS: We get the profile picture from sign-up, store it in our own storage, and use it from there. If the user signs in again — check for a new one and update. Else — skip
Database, Privacy, and Tables
Where to store data? How to bind it?
Easy: Be honest in your Privacy Policy. If you track for ads — notify them. If you keep data in a database — encrypt it. Come on, if you process user data, explain how
The "Table" Logic: Don't dump everything into one place. Create tables! Lots of them
Create joint tables. Keep initial user data isolated and fetch it only with safe service keys
Advanced Level: Things you might have missed
1. Profile Linking
2. Tokens
3. GDPR and the "Right to Forget"
That’s it! Now you have the full picture. As you can see, Login touches profile data so deeply they can't be divided
