Add SSOCredentialsDeserializer for proper JSON deserialization of SSOCredentials

[pmathew92]

Changes

This PR changes the type of the expiresIn property of the SSOCredentials class from Int to Date to keep it consistent with other Credential classes in the code

[Copilot]

Pull request overview

This PR aligns SSOCredentials.expiresIn with other credential models by representing expiration as an absolute Date, and introduces a Gson deserializer to convert the OAuth expires_in seconds value into that Date during JSON parsing.

Changes:

• Change SSOCredentials.expiresIn from Int (seconds) to Date (absolute expiration time) and update its KDoc.
• Add SSOCredentialsDeserializer and register it in GsonProvider to compute the expiration Date from expires_in.
• Update unit tests, mocks, and the v4 migration guide to reflect the new expiresIn type.

Reviewed changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
auth0/src/test/java/com/auth0/android/util/AuthenticationAPIMockServer.kt	Adds a dedicated mock response for SSO exchange containing expires_in.
auth0/src/test/java/com/auth0/android/result/SSOCredentialsMock.kt	Updates test factory to accept Date for expiresIn.
auth0/src/test/java/com/auth0/android/request/internal/SSOCredentialsDeserializerTest.kt	Adds tests validating expires_in seconds are converted into an expiration Date.
auth0/src/test/java/com/auth0/android/request/internal/SSOCredentialsDeserializerMock.kt	Provides a test double for controlling “current time” and object creation.
auth0/src/test/java/com/auth0/android/authentication/storage/SecureCredentialsManagerTest.kt	Updates SSO-related assertions and mocks to use Date expiration.
auth0/src/test/java/com/auth0/android/authentication/storage/CredentialsManagerTest.kt	Updates SSO-related assertions and mocks to use Date expiration.
auth0/src/test/java/com/auth0/android/authentication/AuthenticationAPIClientTest.kt	Uses the new SSO exchange mock response in SSO tests.
auth0/src/main/java/com/auth0/android/result/SSOCredentials.kt	Changes expiresIn to Date and updates documentation accordingly.
auth0/src/main/java/com/auth0/android/request/internal/SSOCredentialsDeserializer.kt	Adds deserializer converting expires_in seconds into a Date.
auth0/src/main/java/com/auth0/android/request/internal/GsonProvider.kt	Registers SSOCredentialsDeserializer for SSOCredentials.
V4_MIGRATION_GUIDE.md	Documents the breaking change (expiresIn from Int to Date) and migration guidance.

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[Copilot]

expiresInDate!! will throw a NullPointerException when expires_in is missing/null/invalid, which is harder to diagnose than a parse error. Treat expires_in as required and throw a JsonParseException with a clear message (or provide a fallback) instead of force-unwrapping.

Suggested change

	var expiresInDate: Date? = null
	if (expiresIn != null) {
	expiresInDate = Date(currentTimeInMillis + expiresIn * 1000)
	}
	return createSSOCredentials(
	sessionTransferToken,
	idToken,
	issuedTokenType,
	tokenType,
	expiresInDate!!,
	if (expiresIn == null) {
	throw JsonParseException("expires_in is required and must be a valid number of seconds")
	}
	val expiresInDate = Date(currentTimeInMillis + expiresIn * 1000)
	return createSSOCredentials(
	sessionTransferToken,
	idToken,
	issuedTokenType,
	tokenType,
	expiresInDate,

[Copilot]

Unused imports JsonParseException and assertThrows will fail Kotlin compilation. Remove them (or add the intended negative test that uses them).

Suggested change

	import com.google.gson.JsonParseException
	import org.hamcrest.CoreMatchers
	import org.hamcrest.MatcherAssert
	import org.hamcrest.Matchers
	import org.hamcrest.core.Is
	import org.junit.Assert.assertThrows
	import org.hamcrest.CoreMatchers
	import org.hamcrest.MatcherAssert
	import org.hamcrest.Matchers
	import org.hamcrest.core.Is