test get user by id route

[wnbck]

test the complete route to get a user by id
follow best practices

[chawlapalak]

Hi @kwlskiy ,

I would like to work on this, please assign this to me. Thanks in advance!

[chawlapalak]

@kwlskiy The PR was submitted for this. Let me know if you need anything else or would like to merge them. Thanks