Fix Doc Tests Compilation

[Borwe]

Basically replaced:

env!("CLIENT_KEY")
env!("CLIENT_SECRET") 

with

std::env::var("CLIENT_KEY").unwrap(),
std::env::var("CLIENT_SECRET").unwrap(),

since the env variables aren't available at compile time we can't use env! directly.

Fixes #97

[Borwe]

Hmm... Still failing, this is interesting lol.

[c12i]

@Borwe thanks for checking this out

the strange thing was that even with env! the tests passed before, my guess is that either the API are down or there are breaking changes that need to be accounted for

[c12i]

will have a closer look at this over the weekend

[itsyaasir]

This issue has been fixed, all the tests are passing.

[itsyaasir]

This issue has been fixed, Thanks @Borwe