Usage changed for private app in readme

[smnbhattarai]

While using the package for private app, I encountered that some parameters are out of order in readme file.

[codecov]

Codecov Report

Merging #96 (9d4719e) into 3.x (499610e) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##                3.x      #96   +/-   ##
=========================================
  Coverage     91.60%   91.60%           
  Complexity     2536     2536           
=========================================
  Files           148      148           
  Lines          4634     4634           
=========================================
  Hits           4245     4245           
  Misses          389      389           

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[slince]

Hello, you may be using version 2. X; in version 3. X, the order of parameters has been adjusted