Update README.md to say where to get creds stuff from

[jfy133]

No description provided.

[codecov-commenter]

Codecov Report

Merging #70 (332da83) into master (fc4fc78) will decrease coverage by 0.27%.
The diff coverage is 0.00%.

❗ Current head 332da83 differs from pull request most recent head de16107. Consider uploading reports for the commit de16107 to get more accurate results

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@@            Coverage Diff            @@
##           master     #70      +/-   ##
=========================================
- Coverage    8.91%   8.64%   -0.27%     
=========================================
  Files          12      12              
  Lines         359     370      +11     
=========================================
  Hits           32      32              
- Misses        327     338      +11     

Impacted Files	Coverage Δ
R/dataprep_get_data.R	0.00% <0.00%> (ø)

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[nevrome]

Ok.