Add example credentials file

[lodewiges]

Having an example credentials file would make it easier to deploy the code with custom credentials

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.13%. Comparing base (74f042a) to head (aabfe45).
Report is 10 commits behind head on staging.

Additional details and impacted files

@@           Coverage Diff            @@
##           staging    #1042   +/-   ##
========================================
  Coverage    75.13%   75.13%           
========================================
  Files           53       53           
  Lines         1102     1102           
========================================
  Hits           828      828           
  Misses         274      274           

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