Strapi, use Auth0 to access user data in Strapi - react-native

Question

I have a React Native app that uses Strapi for its main API.
Some of the API endpoints require authentication so I've used the Auth0 provider and that's all working fine.
A user is now able to log in and I'm securely storing their access_tokens.
So far, Auth0 only gives me an access_token, a refresh_token, an id_token (jwt containing name and email etc) and expiry times for the tokens.
But I'm wondering if it's possible to be able to store a users preferences like whether they prefer dark or light theme etc and extra info such as a user_id in Strapi and let them update it after logging in with Auth0.
The catch is that only that user should have read/write access to their own data.
I can't see any docs or guidance on this kind of thing. Has anyone else managed to implement this kind of thing and if so, a rough approach would be great!
Thanks!

Answer 1

Well, one way of the doing this is creating a OAuthUsers collection in strapi, which will hold basic details of a user like:
first_name
last_name
email
When a user registers on Auth0 and returns back to your site, you can take the basic details that were returned from the identity management platform and store it in strapi under the OAuthUsers collection.
Now, coming to your question on how to store the preferences of the user, what you can do is create another collection called preferences with following attributes:
is_dark_theme
OAuthUser (Make this a one-to-one relation with OAuthUsers collection )
Every time a logged in user updates his preferences it will first come and create an entry in this collection if not already existing. How you can check if an entry exists for a user is by using the email from the JWT token itself, that you attach as the bearer token on the API calls. I will assume, you already know how to decode a JWT token.
So a rudimentary design would be like so:
const is_dark_theme = request.body.is_dark_theme; // 1 or 0 for light theme
const user = await strapi.services.OAuthUsers.find({ email: '[email from JWT]'});
const preference = await strapi.services.preferences.find({ OAuthUser: user.id });
if(preference)
await strapi.services.preferences.update({is_dark_theme}, {id: preference.id});
else
await strapi.services.preferences.create({is_dark_theme, user: user.id});
So per this, what will happen is the user will only be able to update his own details and never be able to touch the preferences of other users as the user will only be able to pass the is_dark_theme parameter from front end and rest of the information will be taken from the JWT token.