Configuring encrypted env variable

Author: michaeltryby

appveyor.yml

@@ -1,7 +1,7 @@
 
 
 environment:
-  my_variable:
+  passphrase:
     secure: En1qcj1/l2B3Nov+vOHlfRrFZk00bg1HPRouD64Gzfw=
   matrix:
     - PYTHON: "C:\\Python36-x64"
@@ -10,7 +10,7 @@ environment:
 install:
     - choco install swig
     - ps: iex ((New-Object Net.WebClient).DownloadString('https://raw.githubusercontent.com/appveyor/secure-file/master/install.ps1'))
-    - appveyor-tools\secure-file -decrypt .coveralls.yml.enc -secret %my_secret%
+    - appveyor-tools\secure-file -decrypt .coveralls.yml.enc -secret %passphrase%
     - "%PYTHON%\\python.exe -m pip install wheel tox"