fix issue where social user saving fails after oauth callback

[zackAJ]

Greetings dojo community, thank you for this awesome project

Issue

• Assuming this project supports laravel 11 ? I'm having an error when using social auth
• Oauth callback throws an error when saving a SocialProviderUser

Reproduce

1- use the Laravel installer and install a fresh latest version application (I used inertia vue stack)
2- install and configure the auth package
3- configure your social auth service (I tried both google and github)
4- try to register with provider, it will fail on the callback when creating a user

Cause

the model SocialProviderUser has a custom (composite?) primaryKey attribute that is an array, see :051748d#diff-79bf4b0babdccd06a4491c7c0c134e34a898e01eac9be350b7430c4184ad44c1R14

this will cause this function in the laravel framework to throw a type error : laravel/framework@92beae3#diff-59d24f1a8f0dd1e51ee7dffc8778133711634e928ecef4a91b63fc3851cb1579R435

array_key_exists() take a $key that must be a primitive, in this case an array is passed ['user_id', 'provider_slug'] which causes a type error:

array_key_exists(): Argument https://github.com/thedevdojo/auth/pull/1 ($key) must be a valid array offset type

The fix

• Change protected $primaryKey = ['user_id', 'provider_slug']; to protected $primaryKey = 'user_id'; and it will work
• I don't know tho why it's an array in the first place, I left a comment to the line owner and I didn't get a response

[tnylea]

Hey @zackAJ!

Thanks for the PR. I'm merging this into a branch on the main repo so we can confirm the tests run and then get it merged into main. Thanks!

[tnylea]

Here's the updated PR ;) #136