Add Missing Methods for Feeds

[Cliftonz]

Some endpoints of the following section can't be hit from this SDK.

We would like to ensure that all endpoints can be hit. For this issue, we would like to build out the Feeds

Some of these methods may already exist. 
If so no need to change/update them, just point out that they already exist and we will close the issue.

This is just to bring every SDK we have on par with all the methods available.

Check all the endpoints here and add the missing ones.

[jerempy]

Opened PR linked above. Got a few more coming for a few of the other missing methods