Update UserInfo.kt

[jkmaina]

The preferred_username, updated_at, given_name and family_name fields captured as null on the userinfo object. This is due to a failure on gson.fromJson conversion for fields with underscores.

Proposing adding annotation for resolving this issue.

Best Regards
James

[Copilot]

Pull request overview

This PR fixes a deserialization issue where fields with underscores (preferred_username, updated_at, given_name, family_name) in the JSON response were not being mapped correctly to the camelCase Kotlin properties, resulting in null values. The fix adds Gson @SerializedName annotations to map the JSON field names to the Kotlin properties, and introduces a JSONConvertable interface with helper methods for JSON serialization/deserialization.

Key changes:

• Added @SerializedName annotations to map JSON snake_case fields to Kotlin camelCase properties
• Introduced JSONConvertable interface with JSON conversion helper methods
• Added Gson import statements

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[Copilot]

The Gson import is used only in the newly added JSONConvertable interface, not in the UserInfo data class itself. Consider moving the JSONConvertable interface and its extension function to a separate utility file to keep concerns separated and avoid coupling the UserInfo data class with Gson implementation details.

[Copilot]

Creating new Gson instances on every serialization/deserialization call is inefficient. Gson objects are thread-safe and intended to be reused. Consider creating a single shared Gson instance to avoid the overhead of repeated instantiation.

Suggested change

	interface JSONConvertable {
	fun toJSON(): String = Gson().toJson(this)
	}
	inline fun <reified T: JSONConvertable> String.toObject(): T = Gson().fromJson(this, T::class.java)
	private val gson = Gson()
	interface JSONConvertable {
	fun toJSON(): String = gson.toJson(this)
	}
	inline fun <reified T: JSONConvertable> String.toObject(): T = gson.fromJson(this, T::class.java)

[Copilot]

Corrected spelling of 'Convertable' to 'Convertible'.

Suggested change

	) : JSONConvertable
	interface JSONConvertable {
	fun toJSON(): String = Gson().toJson(this)
	}
	inline fun <reified T: JSONConvertable> String.toObject(): T = Gson().fromJson(this, T::class.java)
	) : JSONConvertible
	interface JSONConvertible {
	fun toJSON(): String = Gson().toJson(this)
	}
	inline fun <reified T: JSONConvertible> String.toObject(): T = Gson().fromJson(this, T::class.java)

[Subterrane]

Thanks for the fix — the @SerializedName annotations are correct and needed.

A couple of concerns:

• The JSONConvertable interface is unrelated to the serialization bug and should be in a separate PR
• updatedAt remains as String?, but the OIDC spec defines it as a numeric Unix timestamp — should be Long?
• The interface name has a typo ("Convertable" → "Convertible")

I've opened PR #23 which combines the annotation fixes from this PR, PR #6, and PR #16, with the correct type, ProGuard rules, and tests.

[Subterrane]

#23