fix: Check if Oauth login with OKTA is correct

[safeith]

Description

We should check the errors for OKTA Oauth; if we do not check it, it will continue and will create a user with the default information that we create in the return clause.

Why does this happen?
Sometimes users are in more than 100 groups and Okta does not return all the groups and it return the following error message

User info from Okta: {'error': 'server_error', 'error_description': 'The groups claim matched too many groups and must be configured to match fewer groups.'}

It returns an error but, we do not check it and we let it to continue with the following return clause

return {
    "username": "okta_",
    "first_name": "",
    "last_name": "",
    "email": "",
    "role_keys": [],
}

And with data with register a new user(s) here

Finally we have imagery user that many users can login with it

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

Attention: Patch coverage is 0% with 4 lines in your changes are missing coverage. Please review.

Project coverage is 43.59%. Comparing base (6f00efc) to head (adea7d8).
Report is 20 commits behind head on master.

Files	Patch %	Lines
flask_appbuilder/security/manager.py	0.00%	4 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           master    #1926       +/-   ##
===========================================
- Coverage   79.71%   43.59%   -36.12%     
===========================================
  Files          72       72               
  Lines        8990     8754      -236     
===========================================
- Hits         7166     3816     -3350     
- Misses       1824     4938     +3114     

Flag	Coverage Δ
python	43.59% <0.00%> (-36.12%)	⬇️

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[dpgaspar]

Sorry for the delay here, could you please rebase and add a couple of tests. Thank you!

[safeith]

Hi @dpgaspar
No worries, I rebased it.