Fixes #5409 error in access_code.py

[prabhupant]

Fixes #5409

Checklist

• I have read the Contribution & Best practices Guide and my PR follows them.
• My branch is up-to-date with the Upstream development branch.
• The unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

• All the functions created/modified in this PR contain relevant docstrings.

Short description of what this resolves:

in the repr() function of this file, in place of self.id, it should be self.code

Changes proposed in this pull request:

• correction in the repr function of the mentioned file

[codecov]

Codecov Report

Merging #5410 into development will not change coverage.
The diff coverage is 0%.

@@             Coverage Diff              @@
##           development    #5410   +/-   ##
============================================
  Coverage        62.69%   62.69%           
============================================
  Files              261      261           
  Lines            12635    12635           
============================================
  Hits              7921     7921           
  Misses            4714     4714

Impacted Files	Coverage Δ
app/models/access_code.py	60.46% <0%> (ø)	⬆️

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