Examples: Fix doc typos in accounts.

[thylong]

Describe the PR
Fix few documentation typos.

Additional context
Not a big deal, but I'm sure I'm not the only one seeing them 😊

• I believe this could introduce errors when people copy/paste the example.

Thanks for the awesome package!

[codecov-io]

Codecov Report

Merging #643 into master will not change coverage by %.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #643   +/-   ##
=======================================
  Coverage   85.74%   85.74%           
=======================================
  Files           7        7           
  Lines        1726     1726           
=======================================
  Hits         1480     1480           
  Misses        154      154           
  Partials       92       92           

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[sdghchj]

Thanks