Clarify the `.api` method behaviour in the documentation

Hello!
From the documentation I could not understand the meaning of the method api of the instance of the class Phabricator. 
It seems to be only reproducing itself with the same values. 
Is there any reason why this is happening:
```
 >>> phab == phab.api
True
```
?
and also
```
 >>> phab == phab.api.api.api.api.api
True
```
Thanks for your time and patience.