cookies get key hotfix

[YunchuWang]

Description

Fixes #

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PR information

• The title of the PR is clear and informative.
• There are a small number of commits, each of which has an informative message. This means that previously merged commits do not appear in the history of the PR. For information on cleaning up the commits in your pull request, see this page.
• If applicable, the PR references the bug/issue that it fixes in the description.
• New Unit tests were added for the changes made and CI is passing.

Quality of Code and Contribution Guidelines

• I have read the contribution guidelines.

[codecov]

Codecov Report

Merging #1076 (b49b2d4) into dev (7afe38f) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##              dev    #1076   +/-   ##
=======================================
  Coverage   84.01%   84.01%           
=======================================
  Files          34       34           
  Lines        1858     1858           
  Branches      299      299           
=======================================
  Hits         1561     1561           
  Misses        232      232           
  Partials       65       65           

Flag	Coverage Δ
unittests	84.01% <ø> (ø)

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Impacted Files	Coverage Δ
azure_functions_worker/bindings/datumdef.py	72.22% <ø> (ø)

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