fix: azure user info claims and JWT decode

[dpgaspar]

Description

Follow up PR for: #2112

Changes:

• Make authlib import conditional to the OAuth flow.
  id_token from Azure is not always signed, won't verify signature unless set on the config for the provider with verify_signature

OAUTH_PROVIDERS = [
    {
        "name": "azure",
        "icon": "fa-windows",
        "token_key": "access_token",
        "remote_app": {
            "client_id": os.environ.get("AZURE_APPLICATION_ID"),
            "client_secret": os.environ.get("AZURE_SECRET"),
            "api_base_url": f"https://login.microsoftonline.com/{os.environ.get('AZURE_TENANT_ID')}/oauth2",
            "client_kwargs": {
                "scope": "User.Read name email profile",
                "resource": os.environ.get("AZURE_APPLICATION_ID"),
                "verify_signature": True
            },
            "request_token_url": None,
            "access_token_url": f"https://login.microsoftonline.com/"
            f"{os.environ.get('AZURE_TENANT_ID')}/"
            "oauth2/token",
            "authorize_url": f"https://login.microsoftonline.com/"
            f"{os.environ.get('AZURE_TENANT_ID')}/"
            f"oauth2/authorize",
        },
    },
]

cc: @wolfdn

ADDITIONAL INFORMATION

• Has associated issue:
• Is CRUD MVC related.
• Is Auth, RBAC security related.
• Changes the security db schema.
• Introduces new feature
• Removes existing feature

[codecov]

Codecov Report

Merging #2121 (e8774e7) into master (57f4400) will increase coverage by 0.15%.
The diff coverage is 91.66%.

@@            Coverage Diff             @@
##           master    #2121      +/-   ##
==========================================
+ Coverage   78.49%   78.64%   +0.15%     
==========================================
  Files          72       72              
  Lines        8685     8687       +2     
==========================================
+ Hits         6817     6832      +15     
+ Misses       1868     1855      -13     

Flag	Coverage Δ
python	78.64% <91.66%> (+0.15%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
flask_appbuilder/exceptions.py	100.00% <100.00%> (ø)
flask_appbuilder/security/manager.py	79.47% <90.90%> (+1.57%)	⬆️

... and 2 files with indirect coverage changes

[wolfdn]

LGTM! Thanks for fixing this!

[dpgaspar]

LGTM! Thanks for fixing this!

No problem, thank you for your contribution once more, this looks way better now.