Token expiration handler

The accessToken has a limited lifespan. To refresh it when it expires, pass a TokenExpirationHandler to withAccessToken.

The handler should make a call to your backend, obtain a new access token, and then pass it back to the SDK by returning its value.

val tokenHandler = object : TokenExpirationHandler {
    override fun onTokenExpired(): String? {
        val newToken = "..." // get a new token from your backend
        return newToken
    }
}

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Attention

onTokenExpired is called on a non-UI thread.