Channel Points API - Get Custom Rewards Endpoint

[BarryCarlyon]

@JDev

My issue begins when I attempt to call the endpoint to get only manageable rewards. I am attempting to use the same endpoint with an extra param noted in the documentation
( ?&only_manageable_rewards=true)

Sounds like you built the URL wrong, should be

https://api.twitch.tv/helix/channel_points/custom_rewards?broadcaster_id=ID&only_manageable_rewards=true