[DAS 338] - Add user projects api

[Arrotech]

What does this PR do?

Add user projects API

Branch Name?

DAS-338-add-user-projects-api

[tylerwarner33]

Good catch on the multiple user ids @Arrotech! I missed that when going through the documentation but it is clearly listed in the blog post.

Would it make more sense to have the user ids named in a way that matches the functionality & is understandable when looking at the function definition, like adminUserId & projectsUserId, or something like that, instead of userId & userId2?

[Arrotech]

Thanks, @tylerwarner33. Currently, the SDKs use the format userId, userId2. We'll get back to you with a comprehensive solution. By the way, thank you for the great work with the PR.

[sajith-subramanian]

@Arrotech , @tylerwarner33 , @nishchhaldagar -
User-Id in the header could be named actingUserId - Since it is "the ID of a user on whose behalf the request is acting".
And the other one being simply named userId.

[Arrotech]

Thanks @sajith-subramanian , we should then do the same for other instances...This is not the only instance where the userId accours atleast twice. There are other endpoints with more than userId parameters.

[Arrotech]

@sajith-subramanian I have updated the userId2 to actingUserId