✨ Capture osparc envs automatically using a pydantic model

[bisgaard-itis]

What do these changes do?

• This PR is a further development of WIP: ✨ osparc client Configuration defaults to OSPARC_API_BASE_URL, OSPARC_API_KEY and OSPARC_API_SECRET if defined in environment #160

• So far the user would have to do

import os
from osparc import Configuration, ApiClient

cfg = Configuration(
    host=os.environ["OSPARC_API_HOST"],
    username=os.environ["OSPARC_API_KEY"],
    password=os.environ["OSPARC_API_SECRET"],
)
api_client = ApiClient(configuration=cfg)

in order to initiate a session with osparc. Now the user can do

import os
from osparc import ApiClient

api_client = ApiClient()

and the credentials will be automatically captured from the environment.

Limitations

• osparc.Configuration also allows experts users to configure the client in more advances ways, e.g. setting a specific retry strategy. The implementation I add in this PR provides the user with two options: Either use the default behavior in which case the credentials will be caught from the env or explicitly define everything yourself. I.e. the user cannot only define e.g. the retry strategy or get osparc to capture the environment variables automatically. I consider this acceptable because the advanced use case is for expert users who will not be afraid to add a few extra lines of code.

Related issue/s

• closes WIP: ✨ osparc client Configuration defaults to OSPARC_API_BASE_URL, OSPARC_API_KEY and OSPARC_API_SECRET if defined in environment #160
• The commit which implements the necessary changes on the auto generated client side are here: ITISFoundation/openapi-generator@8e87d6c

How to test

For internal developers

[pcrespov]

Well done! I liked a lot your solution!
thx for your help.
I took the liberty to add "close (my PR)" in your description so that it closes my PR when this gets merged. thx

[bisgaard-itis]

Well done! I liked a lot your solution! thx for your help. I took the liberty to add "close (my PR)" in your description so that it closes my PR when this gets merged. thx

thanks