Hue SAML logout not Post CDP logout URL

[tabraiz12]

What changes were proposed in this pull request?

• this seems an existing issue when logout happens from saml, there seems to be user session not being present, so it ends up with internal server errror

hue File "/opt/hive/build/env/lib/python3.9/site-packages/django/contrib/auth/models.py", line 420, in __int__
hue raise TypeError('Cannot cast AnonymousUser to int. Are you trying to use it in place of User?')
hue TypeError: Cannot cast AnonymousUser to int. Are you trying to use it in place of User?

I have made small change to check if user exists before performing that action.

How was this patch tested?

• (Please explain how this patch was tested. Ex: unit tests, manual tests)
• (If this patch involves UI changes, please attach a screen-shot; otherwise, remove this)

Please review Hue Contributing Guide before opening a pull request.

[github-actions]

⚠️ No unit test files modified. Please ensure that changes are properly tested. ⚠️

[github-actions]

Backend Code Coverage Report •

File	Stmts	Miss	Cover	Missing
desktop/core/src/desktop/auth
views.py	207	68	67%	20–21, 59–63, 65, 67–72, 74, 89, 106–107, 115–116, 144–145, 148, 153, 157–158, 161–162, 188, 191–192, 199, 205–206, 245, 253–258, 261, 272, 276, 289, 291–293, 298–299, 301, 303, 305, 310–312, 314–316, 318, 320–321, 323–324, 329–332
TOTAL	53317	26138	50%

Pytest Report

Tests	Skipped	Failures	Errors	Time
1088	107 💤	0 ❌	0 🔥	4m 48s ⏱️