add Sys.getenv to rmd files

Author: minhkhul

.github/workflows/blog.yaml

@@ -51,7 +51,6 @@ jobs:
         run: |
           printenv
           echo $API_KEY
-          echo ${{ secrets.DELPHI_GITHUB_ACTIONS_EPIDATA_API_KEY }} | sed 's/./& /g' 
           npm run build:blog
       - uses: actions/upload-artifact@v3
         with:

content/blog/2020-08-26-fb-survey.Rmd

@@ -48,7 +48,7 @@ output:
 ---
 
 ```{r, echo=FALSE}
-options(covidcast.auth = API_KEY)
+options(covidcast.auth = Sys.getenv("API_KEY"))
 ```
 
 Since April 2020, in collaboration with Facebook,

content/blog/2020-10-06-survey-wave-4.Rmd

@@ -31,7 +31,7 @@ output:
     toc: true
 ---
 ```{r, echo=FALSE}
-options(covidcast.auth = API_KEY)
+options(covidcast.auth = Sys.getenv("API_KEY"))
 ```
 Beginning in early April 2020, the `r blogdown::shortcode_html("reflink", "/", "Delphi group")` has
 conducted a major survey to track COVID-19 across the United States. With the

content/blog/2020-10-14-dv-signal.Rmd

@@ -75,7 +75,7 @@ library(covidcast)
 library(dplyr)
 library(ggplot2)
 library(gridExtra)
-options(covidcast.auth = API_KEY)
+options(covidcast.auth = Sys.getenv("API_KEY"))
 
 # Fetch DV % CLI signal and USAFacts confirmed case incidence proportion at
 # the state level

content/blog/2020-12-10-masks-public.Rmd

@@ -22,7 +22,7 @@ output:
 ---
 
 ```{r, echo=FALSE}
-options(covidcast.auth = API_KEY)
+options(covidcast.auth = Sys.getenv("API_KEY"))
 ```
 
 As COVID cases and deaths continue to rise in the United States, we are

content/blog/2021-01-15-causal-effect-mobility.Rmd

@@ -28,7 +28,7 @@ output:
 ---
 
 ```{r, echo=FALSE}
-options(covidcast.auth = API_KEY)
+options(covidcast.auth = Sys.getenv("API_KEY"))
 ```
 
 ```{r setup, include=FALSE}

content/blog/2021-01-22-holiday-surveys.Rmd

@@ -30,7 +30,7 @@ output:
     toc: true
 ---
 ```{r, echo=FALSE}
-options(covidcast.auth = API_KEY)
+options(covidcast.auth = Sys.getenv("API_KEY"))
 ```
 With pandemic fatigue setting in across the United States after a long year
 filled with uncertainty, many felt the temptation to celebrate a “normal”