Update the commandline-oauth-scopes.py example

[greg-db]

• switch to using the account_info.read scope instead of files.metadata.write as the assert didn't account for the scope dependency on files.metadata.write which caused an error
• actually use the client like in the other examples

[codecov]

Codecov Report

Merging #470 (dad606b) into main (223fe46) will decrease coverage by 0.58%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #470      +/-   ##
==========================================
- Coverage   64.26%   63.69%   -0.58%     
==========================================
  Files          31       31              
  Lines       52609    52609              
  Branches     3841     3841              
==========================================
- Hits        33810    33510     -300     
- Misses      18638    19064     +426     
+ Partials      161       35     -126     

Flag	Coverage Δ
integration	?
unit	63.69% <ø> (ø)

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see 12 files with indirect coverage changes